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An attacker could have exploited a timing attack by sending a large number of allowCredential entries and detecting the difference between invalid key...

A crafted CMS message could have been processed incorrectly, leading to an invalid memory read, and potentially further memory corruption.

When exiting fullscreen mode, an iframe could have confused the browser about the current state of fullscreen, resulting in potential user confusion or...

A malicious webpage could have caused an out-of-bounds write in WebGL, leading to memory corruption and a potentially exploitable crash.

A malicious website could have learned the size of a cross-origin resource that supported Range requests.

Mozilla developers Andrew McCreight, Gabriele Svelto, Tom Ritter and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 99 and Firefox...

Firefox behaved slightly differently for already known resources when loading CSS resources involving CSS variables. This could have been used to probe the...

When reusing existing popups Firefox would have allowed them to cover the fullscreen notification UI, which could have enabled browser spoofing attacks.

The parent process would not properly check whether the Speech Synthesis feature is enabled, when receiving instructions from a child process.

Requests initiated through reader mode did not properly omit cookies with a SameSite attribute.

An improper implementation of the new iframe sandbox keyword allow- top-navigation-by-user-activation could lead to script execution without allow-scripts...

Documents in deeply-nested cross-origin browsing contexts could have obtained permissions granted to the top-level origin, bypassing the existing prompt and...

Mozilla developers and community members Nika Layzell, Andrew McCreight, Gabriele Svelto, and the Mozilla Fuzzing Team reported memory safety bugs present...

Due to a layout change, iframe contents could have been rendered outside of its border. This could have led to user confusion or spoofing attacks.

When generating the assembly code for MLoadTypedArrayElementHole, an incorrect AliasSet was used. In conjunction with another vulnerability this could have...

By using a link with rel="localization" a use-after-free could have been triggered by destroying an object during JavaScript execution and then referencing...

If a compromised content process sent an unexpected number of WebAuthN Extensions in a Register command to the parent process, an out of bounds write would...

When installing an add-on, Thunderbird verified the signature before prompting the user; but while the user was confirming the prompt, the underlying add-on...

Previously Thunderbird for macOS and Linux would download temporary files to a user-specific directory in /tmp, but this behavior was changed to download...

If an attacker could control the contents of an iframe sandboxed with allow-popups but not allow-scripts, they were able to craft a link that, when clicked,...

When resizing a popup after requesting fullscreen access, the popup would not display the fullscreen notification.

An attacker could have caused a use-after-free by forcing a text reflow in an SVG object leading to a potentially exploitable crash.

The rust regex crate did not properly prevent crafted regular expressions from taking an arbitrary amount of time during parsing. If an attacker was able to...

When displaying the sender of an email, and the sender name contained the Braille Pattern Blank space character multiple times, Thunderbird would have...

If an attacker was able to corrupt the methods of an Array object in JavaScript via prototype pollution, they could have achieved execution of...

An attacker could have sent a message to the parent process where the contents were used to double-index into a JavaScript object, leading to prototype...

When viewing an email message A, which contains an attached message B, where B is encrypted or digitally signed or both, Thunderbird may show an incorrect...

When importing a revoked key that specified key compromise as the revocation reason, Thunderbird did not update the existing copy of the key that was not...

After a VR Process is destroyed, a reference to it may have been retained and used, leading to a use-after-free and potentially exploitable crash.

NSSToken objects were referenced via direct points, and could have been accessed in an unsafe way on different threads, leading to a use- after-free and...

A security issue has been found in Firefox before version 95 and Thunderbird before version 91.4.0. It was possible to recreate previous cursor spoofing...

A security issue has been found in Firefox before version 95 and Thunderbird before version 91.4.0. Using the Location API in a loop could have caused...

A security issue has been found in Firefox before version 95 and Thunderbird before version 91.4.0. Documents loaded with the CSP sandbox directive could...

A security issue has been found in Firefox before version 95 and Thunderbird before version 91.4.0. Using XMLHttpRequest, an attacker could have identified...

A security issue has been found in Firefox before version 95 and Thunderbird before version 91.4.0. When invoking protocol handlers for external protocols,...

A security issue has been found in Firefox before version 95 and Thunderbird before version 91.4.0. Failure to correctly record the location of live...

A security issue has been found in Firefox before version 95 and Thunderbird before version 91.4.0. By misusing a race in the notification code, an attacker...

A security issue has been found in Firefox before version 95 and Thunderbird before version 91.4.0. An incorrect type conversion of sizes from 64bit to...

A security issue has been found in Firefox before version 95 and Thunderbird before version 91.4.0. Under certain circumstances, asynchronous functions...

Thunderbird before version 91.4.0 unexpectedly enabled JavaScript in the composition area. The JavaScript execution context was limited to this area and did...

A security issue has been found in Firefox before version 94 and Thunderbird before version 91.3. The executable file warning was not presented when...

A security issue has been found in Firefox before version 94 and Thunderbird before version 91.3. Due to an unusual sequence of attacker-controlled events,...

A security issue has been found in Firefox before version 94 and Thunderbird before version 91.3. By displaying a form validity message in the correct...

A security issue has been found in Firefox before version 94 and Thunderbird before version 91.3. The Opportunistic Encryption feature of HTTP2 (RFC 8164)...

A security issue has been found in Firefox before version 94 and Thunderbird before version 91.3. Through a series of navigations, Firefox and Thunderbird...

A security issue has been found in Firefox before version 94 and Thunderbird before version 91.3. Microsoft introduced a new feature in Windows 10 known as...

A security issue has been found in Firefox before version 94 and Thunderbird before version 91.3. When interacting with an HTML input element's file picker...

A security issue has been found in Firefox before version 94 and Thunderbird before version 91.3. The iframe sandbox rules were not correctly applied to...

Thunderbird before version 91.2 ignored the configuration to require STARTTLS security for an SMTP connection. A man-in-the-middle (MITM) could perform a...

Mozilla developers and community members reported memory safety bugs present in Firefox 92 and Thunderbird 91.1. Some of these bugs showed evidence of...

Mozilla developers and community members reported memory safety bugs present in Firefox 92 and Thunderbird 91.1. Some of these bugs showed evidence of...

During process shutdown, a document could have caused a use-after-free of a languages service object, leading to memory corruption and a potentially...

Through use of reportValidity() and window.open(), a plain-text validation message could have been overlaid on another origin, leading to possible user...

During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in memory corruption and a potentially exploitable crash.

Mozilla developers reported memory safety bugs present in Thunderbird 78.13.0. Some of these bugs showed evidence of memory corruption and Mozilla presumes...

Mozilla developers reported memory safety bugs present in Firefox 91 and Thunderbird 78.13. Some of these bugs showed evidence of memory corruption and...

When delegating navigations to the operating system, Firefox before version 91.1 and Thunderbird before version 78.14 would accept the `mk` scheme which...

In the crossbeam crate, one or more tasks in the worker queue could have been be popped twice instead of other tasks that are forgotten and never popped. If...

An out of bounds write in ANGLE could have allowed an attacker to corrupt memory leading to a potentially exploitable crash in the Chromium browser engine...

Firefox and Thunderbird before version 91.0.1 incorrectly accepted a newline in a HTTP/3 header, interpretting it as two separate headers. This allowed for...

Mozilla developers reported memory safety bugs present in Firefox 90 and Thunderbird 78.12. Some of these bugs showed evidence of memory corruption and...

Firefox before version 91 and Thunderbird before version 78.13 incorrectly treated an inline list-item element as a block element, resulting in an out of...

A security issue has been found in Firefox and Thunderbird before version 91. After requesting multiple permissions, and closing the first permission panel,...

A security issue has been found in Firefox before version 91 and Thunderbird before version 78.13. A suspected race condition when calling getaddrinfo() led...

A security issue has been found in Firefox before version 91 and Thunderbird before version 78.13. A use-after-free vulnerability in media channels could...

A security issue has been found in Firefox before version 91 and Thunderbird before version 78.13. Instruction reordering resulted in a sequence of...

A security issue has been found in Firefox and Thunderbird before version 91. Due to incorrect JIT optimization, it incorrectly interpreted data from the...

A security issue has been found in Firefox and Thunderbird before version 91. An issue present in lowering/register allocation could have led to obscure but...

A security issue has been found in Firefox before version 91 and Thunderbird before version 78.13. Uninitialized memory in a canvas object could have caused...

Mozilla developers reported memory safety bugs present in Firefox 89 and Thunderbird 78.11. Some of these bugs showed evidence of memory corruption and...

A malicious webpage could have triggered a use-after-free, memory corruption, and a potentially exploitable crash. This bug only affected Firefox before...

If Thunderbird before version 78.12 was configured to use STARTTLS for an IMAP connection, and an attacker injected IMAP server responses prior to the...

Mozilla developers reported memory safety bugs present in Firefox 88 and Thunderbird 78.10. Some of these bugs showed evidence of memory corruption and...

If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not...

OpenPGP secret keys that were imported using Thunderbird version 78.8.1 up to version 78.10.1 were stored unencrypted on the user's local disk. The master...

A security issue has been found in Thunderbird for Windows before version 78.10.1. The Maintenance Service granted SERVICE_START access to BUILTIN|Users...

A security issue was found in Thunderbird before version 78.8.1. Thunderbird unprotects a secret OpenPGP key prior to using it for a decryption, signing or...

A security issue was found in Thunderbird before version 78.9.1. When loading the shared library that provides the OTR protocol implementation, Thunderbird...

A security issue has been found in Thunderbird before version 78.10. Signatures are written to disk before and read during verification, which might be...

A security issue has been found in Firefox before version 88 and Thunderbird before version 78.10. Ports that were written as an integer overflow above the...

A security issue has been found in Firefox before version 88 and Thunderbird before version 78.10. The WebAssembly JIT could miscalculate the size of a...

A security issue has been found in Firefox before version 88 and Thunderbird before version 78.10. When a user clicked on an FTP URL containing encoded...

A security issue has been found in Firefox before version 88 and Thunderbird before version 78.10. If a Blob URL was loaded through some unusual user...

A security issue has been found in Firefox before version 88 and Thunderbird before version 78.10. Through complicated navigations with new windows, an HTTP...

A security issue has been found in Firefox before version 88 and Thunderbird before version 78.10. When Responsive Design Mode was enabled, it used...

A security issue has been found in Firefox before version 88 and Thunderbird before version 78.10. A WebGL framebuffer was not initialized early enough,...

A security issue was found in Thunderbird before version 78.9.1. An attacker may perform a denial of service (DoS) attack to prevent a user from sending...

Thunderbird before version 78.9.1 did not check if the user ID associated with an OpenPGP key has a valid self signature. An attacker may create a crafted...

A security issue was found in Thunderbird before version 78.9.1. If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended...

A security issue was found in Firefox before version 87 and Thunderbird before version 78.9. Mozilla developers and community members reported memory safety...

A security issue was found in Firefox before version 87 and Thunderbird before version 78.9. A malicious extension could have opened a popup window lacking...

A security issue was found in Firefox before version 87 and Thunderbird before version 78.9. Using techniques that built on the slipstream research, a...

A security issue was found in Firefox before version 87 and Thunderbird before version 78.9. A texture upload of a Pixel Buffer Object could have confused...

A security issue was found in Firefox before version 86.0 and Thunderbird before version 78.8. Mozilla developers reported memory safety bugs present in...

A security issue was found in Firefox before version 86.0 and Thunderbird before version 78.8. When trying to load a cross-origin resource in an audio/video...

A security issue was found in Firefox before version 86.0 and Thunderbird before version 78.8. As specified in the W3C Content Security Policy draft, when...

A security issue was found in Firefox before version 86.0 and Thunderbird before version 78.8. If Content Security Policy blocked frame navigation, the full...

A security issue was found in Firefox before version 85.0 and Thunderbird before version 78.7. Mozilla developers reported memory safety bugs present in...

A security issue was found in Firefox before version 85.0. Further techniques that built on the slipstream research combined with a malicious webpage could...

A security issue was found in Firefox before version 85.0 and Thunderbird before version 78.7. Performing garbage collection on re- declared JavaScript...

A security issue was found in Firefox before version 85.0 and Thunderbird before version 78.7. Using the new logical assignment operators in a JavaScript...

A security issue was found in Firefox before version 85.0 and Thunderbird before version 78.7. If a user clicked into a specifically crafted PDF, the PDF...

Mozilla developer Christian Holler reported memory safety bugs present in Firefox 83, Firefox ESR 78.5 and Thunderbird 78.5. Some of these bugs showed...

If a user downloaded a file lacking an extension on Firefox for Windows before 84.0 or Thunderbird for Windows before 78.6, and then "Open"-ed it from the...

A security issue was discovered in Firefox before 84.0 and Thunderbird before 78.6. When an extension with the proxy permission registered to receive...

A security issue was discovered in Firefox before 84.0 and Thunderbird before 78.6. Using techniques that built on the slipstream research, a malicious...

A security issue was found in Firefox before 84.0. When an HTTPS page was embedded in an HTTP page, and there was a service worker registered for the...

A security issue was found in Firefox before 84.0 and Thunderbird before 78.6. When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object...

A security issue was found in Firefox before 84.0 and Thunderbird before 78.6 where certain input to the CSS Sanitizer confused it, resulting in incorrect...

A security issue was found in Firefox before 84.0 and Thunderbird before 78.6 where certain blit values provided by the user were not properly constrained,...

When reading SMTP server status codes, Thunderbird before 78.5.1 writes an integer value to a position on the stack that is intended to contain just one...

A security issue was found in Firefox before 84.0.2, Thunderbird before 78.6.1 and Chromium before 88.0.4324.96. A malicious peer could have modified a...

An uninitialized use security issue has been found in the V8 component of the chromium browser before version 87.0.4280.88 and Firefox before 84.0.

A security issue was found in Thunderbird before version 78.7. During the plaintext phase of the STARTTLS connection setup, protocol commands could have...

Mozilla developers and community members reported memory safety bugs present in Firefox 78 and Firefox ESR 78.0. Some of these bugs showed evidence of...

The code for downloading files did not properly take care of special characters, which led to an attacker being able to cut off the file ending at an...

JIT optimizations involving the Javascript arguments object could confuse later optimizations. This risk was already mitigated by various precautions in the...

A redirected HTTP request which is observed or modified through a web extension could bypass existing CORS checks, leading to potential disclosure of...

When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when they...

An iframe sandbox element with the allow-popups flag could be bypassed when using noopener links. This could have led to security issues for websites...

By observing the stack trace for JavaScript errors in web workers, it was possible to leak the result of a cross-origin redirect. This applied only to...

Mozilla developers Tom Tung and Karl Tomlinson reported memory safety bugs present in Firefox 76, Firefox ESR 68.8 and Thunderbird before 68.9.0. Some of...

Mozilla Developer Iain Ireland discovered a missing type check in Firefox before 77.0 and Thunderbird before 68.9.0 during unboxed objects removal,...

When browsing a malicious page in Firefox before 77.0 and Thunderbird before 68.9.0, a race condition in our SharedWorkerService could occur and lead to a...

NSS before 3.52.1, as used in Firefox before 77.0 and Thunderbird before 68.9.0, has shown timing differences when performing DSA signatures, which was...

A security downgrade issue has been found in Thunderbird before 68.9.0. If Thunderbird is configured to use STARTTLS for an IMAP server, and the server...

An spoofing email address issue has been found in Thunderbird before 68.8.0. By encoding Unicode whitespace characters within the From email header, an...

Several memory safety bugs has been found in Firefox before 76.0, Firefox ESR before 68.8 and Thunderbird before 68.8.0. Some of these bugs showed evidence...

The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP POST data of a request in Firefox before 76.0 and Thunderbird before...

A race condition has been found in Firefox before 76.0 and Thunderbird before 68.8.0, when running shutdown code for Web Worker, leading to a use-after-free...

A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC, in Firefox before 76.0, Thunderbird before 68.8.0 and chromium before...

An information disclosure issue has been found in Firefox before 75.0 and Thunderbird before 68.7.0. When reading from areas partially or fully outside the...

A use-after-free vulnerability has been found in Firefox before 74.0.1 and Thunderbird before 68.7.0 where, under certain conditions, when handling a...

A use-after-free vulnerability has been found in Firefox before 74.0.1 and Thunderbird before 68.7.0 where under certain conditions, when running the...

Several memory safety and script safety bugs have been found in Firefox before 74 and Thunderbird before 68.7.0. Some of these bugs showed evidence of...

Several memory safety and script safety bugs have been found in Firefox before 74, Firefox ESR before 68.6 and Thunderbird before 68.6. Some of these bugs...

An information disclosure issue has been found in Firefox before 74 and Thunderbird before 68.6. The first time AirPods are connected to an iPhone, they...

A security issue has been found in Firefox before 74 and Thunderbird before 68.6, where the 'Copy as cURL' feature of Devtools' network tab did not properly...

A use-after-free issue has been found in Firefox before 74 and Thunderbird before 68.6, in cubeb  during stream destruction. When a device was changed while...

A state confusion issue has been found in Firefox before 74 and Thunderbird before 68.6, in BodyStream::OnInputStreamReady. By carefully crafting promise...

A use-after-free issue has been found in Firefox before 74 and Thunderbird before 68.6. When removing data about an origin whose tab was recently closed, a...

Several memory safety bugs have been found in Firefox before 73.0 and Thunderbird before 68.5. Some of these bugs showed evidence of memory corruption and...

An incorrect parsing of template could result in Javascript injection in Firefox before 73.0 and Thunderbird before 68.5. If a <template> tag was used in a...

A null-pointer dereference has been found in Thunderbird before 68.5, when processing a message that contains multiple S/MIME signatures.

It has been found that setting a master password post-Thunderbird 52 does not delete unencrypted previously stored passwords before Thunderbird 68.5. If a...

An out-of-bounds read has been found in Thunderbird before 68.5, when processing an e-mail message with an ill-formed envelope.

An information disclosure issue has bee found in Thunderbird before 68.5. When deriving an Message ID identifier for an email message, uninitialized memory...

Inappropriate implementation in WebRTC.

Use after free in ANGLE in Google Chrome prior to 81.0.4044.122 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

An out-of-bounds read has been found in Firefox before 74, Thunderbird before 68.6 and chromium before 80.0.3987.149. The inputs to...

An issue has been found in Thunderbird before 60.7.0, where cross- origin images can be read from a canvas element in violation of the same-origin policy...

A type confusion vulnerability has been found in Firefox before 72.0.1, and Thunderbird before 68.4.1. Incorrect alias information in IonMonkey JIT compiler...

Several memory safety issues have been found in Firefox before 72.0, Firefox ESR before 68.4.1, and Thunderbird before 68.3. Some of these bugs showed...

A security issue has been found in Firefox before 72.0, and Thunderbird before 68.4.1 where CSS sanitization does not escape HTML tags. When pasting a...

A type confusion issue has been found in Firefox before 72.0, and Thunderbird before 68.4.1, in XPCVariant.cpp where, due to a missing case handling object...

A security issue has been found in Firefox before 72.0, and Thunderbird before 68.4.1. When pasting a <style> tag from the clipboard into a rich text...

Several memory safety bugs have been found in Firefox before 71.0 and Thunderbird before 68.3. Some of these bugs showed evidence of memory corruption and...

A use-after-free vulnerability has been found in Firefox before 71.0 and Thunderbird before 68.3. Under certain conditions, when retrieving a document from...

A use-after-free vulnerability has been found in Firefox before 71.0 and Thunderbird before 68.3. Under certain conditions, when checking the Resist...

A use-after-free vulnerability has been found in Firefox before 71.0 and Thunderbird before 68.3. When using nested workers, a use-after- free could occur...

An out-of-bounds write vulnerability has been found in Firefox before 71.0 and Thunderbird before 68.3 where the plain text serializer used a fixed-size...

A security issue has been found in libexpat before 2.2.8, where crafted XML input could fool the parser into changing from DTD parsing to document parsing...

Several memory safety bugs have been found in Firefox before 70.0 and Thunderbird before 68.2. Some of these bugs showed evidence of memory corruption and...

An issue has been found in Firefox before 70.0 and Thunderbird before 68.2, where failure to correctly handle null bytes when processing HTML entities...

A same-origin policy bypass has been found in Firefox before 70.0 and Thunderbird before 68.2 where, if two same-origin documents set document.domain...

An issue has been found in Firefox before 70.0 and Thunderbird before 68.2, where by using a form with a data URI it was possible to gain access to the...

A fixed-size stack buffer overflow has been found in nrappkit, in the WebRTC signaling code of Firefox before 70.0 and Thunderbird before 68.2.

A stack-based buffer overflow has been found in the HKDF output of Firefox before 70.0 and Thunderbird before 68.2. An attacker could have caused 4 bytes of...

A use-after-free issue has been found in the IndexedDB component of Firefox before 70.0 and Thunderbird before 68.2. When storing a value in IndexedDB, the...

An out-of-bounds write vulnerability has been found in the NSS component of Firefox before 71.0 and Thunderbird before 68.3. When encrypting with a block...

A flaw in Thunderbird's implementation of iCal before 60.7.1 causes a type confusion in icaltimezone_get_vtimezone_properties when processing certain email...

A flaw in Thunderbird's implementation of iCal before 60.7.1 causes a stack buffer overflow in icalrecur_add_bydayrules when processing certain email...

A flaw in Thunderbird's implementation of iCal before 60.7.1 causes a heap buffer overflow in icalmemory_strdup_and_dequote when processing certain email...

A flaw in Thunderbird's implementation of iCal before 60.7.1 causes a heap buffer overflow in parser_get_next_char when processing certain email messages,...

If a crafted hyperlink is dragged and dropped to the bookmark bar or sidebar in Firefox before 67.0 or Thunderbird before 60.7.0, and the resulting bookmark...

The bufferdata function in WebGL in Firefox before 67.0 and Thunderbird before 60.7.0 is vulnerable to a buffer overflow with specific graphics drivers on...

A use-after-free vulnerability can occur in Firefox before 67.0 and Thunderbird before 60.7.0, when listeners are removed from the event listener manager...

A use-after-free vulnerability can occur in Firefox before 67.0 and Thunderbird before 60.7.0, when working with XMLHttpRequest (XHR) in an event loop,...

A vulnerability where a JavaScript compartment mismatch can occur in Firefox before 67.0 and Thunderbird before 60.7.0, while working with the fetch API,...

In Firefox before 67.0 and Thunderbird before 60.7.0, images from a different domain can be read using a canvas object in some circumstances. This could be...

A possible vulnerability exists in Firefox before 67.0 and Thunderbird before 60.7.0, where type confusion can occur when manipulating JavaScript objects in...

An incorrect handling of __proto__ mutations may lead to type confusion in the IonMonkey JIT code of Firefox before 66.0.1 and Thunderbird before 60.6.1,...

An incorrect alias information in the IonMonkey JIT compiler of Firefox before 66.0.1 and Thunderbird before 60.6.1 for the Array.prototype.slice method may...

Several memory safety bugs have been found in Firefox before 67.0 and Thunderbird before 60.7.0. Some of these bugs showed evidence of memory corruption and...

png_image_free in png.c in libpng 1.6.36 has a use-after-free because png_image_free_function is called under png_safe_execute.

An out-of-bounds read has been found in the Skia component of the chromium browser before 73.0.3683.75 and Thunderbird before 60.7.0.

An integer overflow issue has been found in the Skia component of firefox before 65.0.1 and thunderbird before 60.5.1.

A flaw during verification of certain S/MIME signatures causes emails to be shown in Thunderbird before 60.5.1 as having a valid digital signature, even if...

A use-after-free has been found in the Skia component of chromium before 71.0.3578.80 and firefox before 65.0.1 and thunderbird before 60.5.1.

A heap-based buffer overflow has been found in the Skia component of chromium before 71.0.3578.80 and thunderbird before 60.5.1.

A security issue has been found in Firefox and Thunderbird versions prior to 63.0. When manipulating user events in nested loops while opening a document...

Several memory safety bugs have been found in Firefox and Thunderbird versions prior to 63.0. Some of these bugs showed evidence of memory corruption and...

Several memory safety bugs have been found in Thunderbird versions prior to 63.0. Some of these bugs showed evidence of memory corruption and Mozilla...

A security issue has been found in Thunderbird versions prior to 60.2.1. A potentially exploitable crash in TransportSecurityInfo used for SSL can be...

A security issue has been found in Thunderbird versions prior to 60.2.1. If a user saved passwords before the move to a new password format and then later...

A security issue has been found in Thunderbird versions prior to 60.2.1. When the Mozilla Updater opens a MAR format file which contains a very long item...

A use-after-free vulnerability has been found in Thunderbird versions prior to 60.2.1, which can occur when an IndexedDB index is deleted while still in use...

A use-after-free vulnerability has been found in Thunderbird versions prior to 60.2.1, which can occur when refresh driver timers are refreshed in some...

Several memory safety bugs have been found in Thunderbird versions prior to 60.2.1.

A security issue has been found in Thunderbird before 52.9, where plaintext of decrypted emails can leak through by user submitting an embedded form by...

A security issue has been found in Thunderbird before 52.9, where S/MIME parts hidden with CSS or <plaintext> can leak plaintext when included in a HTML...

A security issue has been found in Thunderbird before 52.9, where decrypted S/MIME parts, when included in HTML crafted for an attack, can leak plaintext...

An integer overflow vulnerability has been found in the Skia library shipped with Firefox before 61.0  and Thunderbird before 60.0, when allocating memory...

A security issue has been found in Firefox before 61.0 and Thunderbird before 60.0. In the previous mitigations for Spectre, the resolution or precision of...

An invalid grid size during QCMS (color profile) transformations can result in the out-of-bounds read interpreted as a float value, in Firefox before 61.0...

A security issue has been found in Firefox before 61.0 and Thunderbird before 52.9 where a compromised IPC child process can escape the content sandbox and...

A security issue has been found in Firefox before 61.0 and Thunderbird before 52.9, where NPAPI plugins, such as Adobe Flash, can send non- simple...

A use-after-free vulnerability can occur in Firefox before 61.0 and Thunderbird before 52.9 when script uses mutation events to move DOM nodes between...

An integer overflow can occur in Firefox before 61.0 and Thunderbird before 52.9 during graphics operations done by the Supplemental Streaming SIMD...

An integer overflow can occur in Firefox before 61.0 and Thunderbird before 60.0 in the SwizzleData code while calculating buffer sizes. The overflowed...

A use-after-free vulnerability can occur in Firefox before 61.0 and Thunderbird before 52.9 when deleting an input element during a mutation event handler...

A buffer overflow can occur in Firefox before 61.0 and Thunderbird before 52.9 when rendering canvas content while adjusting the height and width of the...

Several memory safety bugs have been found in Firefox before 61.0 and Thunderbird before 52.9. Some of these bugs showed evidence of memory corruption and...

Several memory safety bugs have been found in Firefox before 61.0 and Thunderbird before 60.0. Some of these bugs showed evidence of memory corruption and...

A security issue has been found in Thunderbird before 52.8, where plaintext of decrypted emails can leak through by user submitting an embedded form.

A security issue has been found in Thunderbird before 52.8, where using remote content in S/MIME encrypted messages can lead to the disclosure of plaintext...

Several memory corruption issues including invalid buffer reads and writes during graphic operations have been found in the Skia library.

A buffer overflow was found in Thunderbird before 52.8, during UTF8 to Unicode string conversion within JavaScript with extremely large amounts of data....

It is possible in Thunderbird before 52.8 to spoof the filename of an attachment and display an arbitrary attachment name. This could lead to a user opening...

Sites can bypass security checks on permissions to install lightweight themes in Firefox before 60.0 and Thunderbird before 52.8, by manipulating the...

A security issue has been found in Thunderbird before 52.8, where plaintext of decrypted emails can leak through the src attribute of remote images, or links.

A security issue has been found in Thunderbird before 52.8, where crafted message headers can cause a Thunderbird process to hang on receiving the message.

An integer overflow vulnerability has been found in the Skia library used in Firefox < 60.0 and Thunderbird < 52.8, due to 32-bit integer use in an array...

A vulnerability can occur in Firefox before 61.0  and Thunderbird before 60.0 when capturing a media stream when the media source type is changed as the...

A use-after-free vulnerability has been found in Firefox < 60.0 and Thunderbird < 52.8, while adjusting layout during SVG animations with text paths.

A use-after-free vulnerability has been found in Firefox < 60.0 and Thunderbird < 52.8, while enumerating attributes during SVG animations with clip paths.

Several memory safety bugs have been found in Firefox before 60.0 and Thunderbird before 52.8. Some of these bugs showed evidence of memory corruption and...

An out of bounds memory write vulnerability has been discovered in libvorbis before 1.3.6 while processing Vorbis audio data related to codebooks that are...

Various memory safety bugs have been found in Thunderbird < 52.7.0, some of them presenting evidence of memory corruption. Mozilla presumes that with enough...

An integer overflow can occur during conversion of text to some Unicode character sets in Thunderbird < 52.7.0, due to an unchecked length parameter.

A lack of parameter validation on IPC messages results in a potential out-of-bounds write in Thunderbird < 52.7.0, through malformed IPC messages. This can...

A buffer overflow can occur in Thunderbird < 52.7.0 when manipulating the SVG animatedPathSegList through script. This results in a potentially exploitable crash.

Various memory safety bugs have been found in Thunderbird < 52.7.0 and Firefox < 59.0, some of them presenting evidence of memory corruption. Mozilla...

The Resource Timing API in Firefox before 57.0 and Thunderbird before 52.5 incorrectly revealed navigations in cross-origin iframes. This is a same-origin...

A use-after-free vulnerability can occur in Firefox before 57.0 and Thunderbird before 52.5 when flushing and resizing layout because the PressShell object...

Several reported memory safety bugs have been found in Firefox before 57.0 and Thunderbird before 52.5. Some of these bugs showed evidence of memory...

A buffer overflow occurs when drawing and validating elements with the ANGLE graphics library, used for WebGL content in Thunderbird < 52.4. This is due to...

The content security policy (CSP) sandbox directive in Thunderbird < 52.4  did not create a unique origin for the document, causing it to behave as if the...

A use-after-free vulnerability can occur in design mode when image objects are resized if objects referenced during the resizing have been freed from...

A use-after-free vulnerability can occur when manipulating arrays of Accessible Rich Internet Applications (ARIA) elements within containers through the...

A security issue has been found in Thunderbird < 52.4. File downloads encoded with blob: and data: URL elements bypassed normal file download checks though...

Mozilla developers and community members Christoph Diehl, Jan de Mooij, Jason Kratzer, Randell Jesup, Tom Ritter, Tyson Smith, and Sebastian Hengst reported...

A use-after-free issue has been found in firefox < 55.0 and thunderbird < 52.3, when an editor DOM node is deleted prematurely during tree traversal while...

A domain hijacking flaw has been found in firefox < 55.0 and thunderbird < 52.3. A mechanism that uses AppCache to hijack a URL in a domain using fallback...

A security issue has been found in Thunderbird < 52.4. During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer. This saved...

A security issue has been found in firefox < 55.0 and thunderbird < 52.3. When a page’s content security policy (CSP) header contains a sandbox directive,...

A use-after-free vulnerability has been found in firefox < 55.0 and thunderbird < 52.3, when manipulating the DOM during the resize event of an image...

A use-after-free issue has been found in firefox < 55.0 and thunderbird < 52.3, while re-computing layout for a marquee element during window resizing where...

A use-after-free issue has been found in firefox < 55.0 and thunderbird < 52.3, in WebSockets, when the object holding the connection is freed before the...

A use-after-free vulnerability can occur in the Fetch API of Thunderbird < 52.4, when the worker or the associated window are freed when still in use,...

A buffer overflow has been found in firefox < 55.0 and thunderbird < 52.3, when viewing a certificate in the certificate manager if the certificate has an...

A content spoofing issue has been found in firefox < 55.0 and thunderbird < 52.3. On pages containing an iframe, the data: protocol can be used to create a...

Same-origin policy protections can be bypassed in firefox < 55.0 and thunderbird < 52.3, on pages with embedded iframes during page reloads, allowing the...

A buffer overflow has been found in firefox < 55.0 and thunderbird < 52.3, when the image renderer attempts to paint non-displayable SVG elements. This...

A buffer overflow has been found in firefox < 55.0 and thunderbird < 52.3, when manipulating Accessible Rich Internet Applications (ARIA) attributes within...

A use-after-free issue has been found in firefox < 55.0 and thunderbird < 52.3, when reading an image observer during frame reconstruction after the...

Several memory safety bugs have been found in firefox < 55.0 and thunderbird < 52.3. Some of these bugs showed evidence of memory corruption and we presume...

An out-of-bounds write has been found in the Graphite 2 library used in Firefox < 54.0 and Thunderbird < 52.2, in lz4::decompress.

An use of initialized memory has been found in the Graphite 2 library used in Firefox < 54.0 and Thunderbird < 52.2, in GlyphCache::Loader::read_glyph.

A heap-buffer-overflow read has been found in the Graphite 2 library used in Firefox < 54.0 and Thunderbird < 52.2, in Silf::getClassGlyph.

An assertion failure has been found in the Graphite 2 library used in Firefox < 54.0 and Thunderbird < 52.2.

An out-of-bounds read has been found in the Graphite 2 library used in Firefox < 54.0 and Thunderbird < 52.2, in Silf::readGraphite.

A heap-buffer-overflow write has been found in the Graphite 2 library used in Firefox < 54.0 and Thunderbird < 52.2, in lz4::decompress.

A heap-buffer-overflow write has been found in the Graphite 2 library used in Firefox < 54.0 and Thunderbird < 52.2, in lz4::decompress.

An out-of-bounds read has been found in the Graphite 2 library used in Firefox < 54.0 and Thunderbird < 52.2, in Pass::readPass.

A security issue has been found in Firefox < 54.0 and Thunderbird < 52.2, where characters from the "Canadian Syllabics" unicode block can be mixed with...

An out-of-bounds read vulnerability has been found in Firefox < 54.0 and Thunderbird < 52.2, with the Opus encoder when the number of channels in an audio...

A use after-free vulnerability has been found in Firefox < 54.0 and Thunderbird < 52.2, in IndexedDB when one of its objects is destroyed in memory while a...

A use after-free and use-after-scope vulnerability has been found in Firefox < 54.0 and Thunderbird < 52.2, when logging errors from headers for XML HTTP...

An out-of-bounds read has been found in Firefox < 54.0 and Thunderbird < 52.2, with a maliciously crafted ImageInfo object during WebGL operations.

An out-of-bounds read  has been found in firefox < 55.0 and thunderbird < 52.3, when applying style rules to pseudo-elements, such as ::first-line, using...

A use-after-free has been found in Firefox < 54.0 and Thunderbird < 52.2, during specific user interactions with the input method editor (IME) in some...

A use-after-free has been found in Firefox < 54.0 and Thunderbird < 52.2, in content viewer listeners.

A use-after-free has been found in Firefox < 54.0 and Thunderbird < 52.2, during video control operations when a <track> element holds a reference to an...

A user-after-free has been found in Firefox < 54.0 and Thunderbird < 52.2, when using an incorrect URL during the reloading of a docshell.

A use-after-free vulnerability has been found in Firefox < 54.0 and Thunderbird < 52.2, in the frameloader during tree reconstruction while regenerating CSS...

Several memory safety issues leading to arbitrary code execution have been found in Firefox < 54.0 and Thunderbird < 52.2.

Memory corruption resulting in a potentially exploitable crash during garbage collection of JavaScript due errors in how incremental sweeping is managed for...

Video files loaded video captions cross-origin without checking for the presence of CORS headers permitting such cross-origin use, leading to potential...

Using SVG filters that don't use the fixed point math implementation on a target iframe, a malicious page can extract pixel values from a targeted user....

Certain response codes in FTP connections can result in the use of uninitialized values for ports in FTP operations.

A use-after-free error can occur when manipulating ranges in selections with one node inside a native anonymous tree and one node outside of it. This...

A use-after-free can occur when events are fired for a FontFace object after the object has been already been destroyed while working with fonts.

A crash triggerable by web content in which an ErrorResult references unassigned memory due to a logic error.

JIT-spray targeting asm.js combined with a heap spray allows for a bypass of ASLR and DEP protections leading to potential memory corruption attacks.

Several memory safety bugs, some of them leading to memory corruption issues have been found in Firefox < 52 and Thunderbird < 45.8.

A use-after-free vulnerability has been found in the Media Decoder of Firefox < 51 and Thunderbird < 45.7, when working with media files when some events...

The JSON viewer in the Developer Tools in Firefox < 51 and Thunderbird < 45.7 uses insecure methods to create a communication channel for copying and...

URLs containing certain unicode glyphs for alternative hyphens and quotes do not properly trigger punycode display in Firefox < 51 and Thunderbird < 45.7,...

A potential use-after-free vulnerability during DOM manipulation of SVG content has been in Firefox < 51 and Thunderbird < 45.7.

An information disclosure vulnerability has been found in Firefox < 51 and Thunderbird < 45.7, where hashed codes of JavaScript objects are shared between...

A use-after-free vulnerability has been found in Firefox < 51 and Thunderbird < 45.7, while manipulating XSL in XSLT documents.

JIT code allocation in Firefox < 51 and Thunderbird < 45.7 can allow for a bypass of ASLR and DEP protections leading to potential memory corruption attacks.

Several memory safety bugs have been found in Firefox < 51 and Thunderbird < 47.5. Some of these bugs showed evidence of memory corruption and we presume...

A use-after-free vulnerability has been discovered in the SVG Animation component of Firefox, leading to arbitrary code execution.