Mozilla Firefox vulnerabilities

CVE-2024-3864 [HIGH] CWE-119 CVE-2024-3864: Memory safety bug present in Firefox 124, Firefox ESR 115.9, and Thunderbird 115.9. This bug showed Memory safety bug present in Firefox 124, Firefox ESR 115.9, and Thunderbird 115.9. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.

CVE-2012-1952 [CRITICAL] CWE-399 CVE-2012-1952: The nsTableFrame::InsertFrames function in Mozilla Firefox 4.x through 13.0, Firefox ESR 10.x before The nsTableFrame::InsertFrames function in Mozilla Firefox 4.x through 13.0, Firefox ESR 10.x before 10.0.6, Thunderbird 5.0 through 13.0, Thunderbird ESR 10.x before 10.0.6, and SeaMonkey before 2.11 does not properly perform a cast of a frame variable during processing of mixed row-group and column-group frames, which might allow remote attackers

CVE-2016-5287 [CRITICAL] CWE-416 CVE-2016-5287: A potentially exploitable use-after-free crash during actor destruction with service workers. This i A potentially exploitable use-after-free crash during actor destruction with service workers. This issue does not affect releases earlier than Firefox 49. This vulnerability affects Firefox < 49.0.2.

CVE-2025-4093 [HIGH] CWE-119 CVE-2025-4093: Memory safety bug present in Firefox ESR 128.9, and Thunderbird 128.9. This bug showed evidence of m Memory safety bug present in Firefox ESR 128.9, and Thunderbird 128.9. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128.10 and Thunderbird 128.10.

CVE-2025-13027 [HIGH] CWE-119 CVE-2025-13027: Memory safety bugs present in Firefox 144 and Thunderbird 144. Some of these bugs showed evidence of Memory safety bugs present in Firefox 144 and Thunderbird 144. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 145 and Thunderbird 145.

CVE-2026-8969 [HIGH] CWE-693 CVE-2026-8969: Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151 and Th Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

CVE-2013-0764 [CRITICAL] CWE-326 CVE-2013-0764: The nsSOCKSSocketInfo::ConnectToProxy function in Mozilla Firefox before 18.0, Firefox ESR 17.x befo The nsSOCKSSocketInfo::ConnectToProxy function in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.2, Thunderbird before 17.0.2, Thunderbird ESR 17.x before 17.0.2, and SeaMonkey before 2.15 does not ensure thread safety for SSL sessions, which allows remote attackers to execute arbitrary code via crafted data, as demonstrated by e-mail mes

CVE-2010-3770 [MEDIUM] CWE-79 CVE-2010-3770: Multiple cross-site scripting (XSS) vulnerabilities in the rendering engine in Mozilla Firefox befor Multiple cross-site scripting (XSS) vulnerabilities in the rendering engine in Mozilla Firefox before 3.5.16 and 3.6.x before 3.6.13, and SeaMonkey before 2.0.11, allow remote attackers to inject arbitrary web script or HTML via (1) x-mac-arabic, (2) x-mac-farsi, or (3) x-mac-hebrew characters that may be converted to angle brackets during rendering.

CVE-2019-9819 [CRITICAL] CWE-843 CVE-2019-9819: A vulnerability where a JavaScript compartment mismatch can occur while working with the fetch API, A vulnerability where a JavaScript compartment mismatch can occur while working with the fetch API, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

CVE-2019-9820 [CRITICAL] CWE-416 CVE-2019-9820: A use-after-free vulnerability can occur in the chrome event handler when it is freed while still in A use-after-free vulnerability can occur in the chrome event handler when it is freed while still in use. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

CVE-2014-1478 [CRITICAL] CWE-787 CVE-2014-1478: Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 27.0 and SeaMon Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 27.0 and SeaMonkey before 2.24 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to the MPostWriteBarrier class in js/src/jit/MIR.h and stack alignment in js/src/jit/A

CVE-2012-5830 [HIGH] CWE-416 CVE-2012-5830: Use-after-free vulnerability in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunde Use-after-free vulnerability in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 on Mac OS X allows remote attackers to execute arbitrary code via an HTML document.

CVE-2018-5116 [CRITICAL] CWE-346 CVE-2018-5116: WebExtensions with the "ActiveTab" permission are able to access frames hosted within the active tab WebExtensions with the "ActiveTab" permission are able to access frames hosted within the active tab even if the frames are cross-origin. Malicious extensions can inject frames from arbitrary origins into the loaded page and then interact with them, bypassing same-origin user expectations with this permission. This vulnerability affects Firefox < 58

CVE-2022-45406 [CRITICAL] CWE-416 CVE-2022-45406: If an out-of-memory condition occurred when creating a JavaScript global, a JavaScript realm may be If an out-of-memory condition occurred when creating a JavaScript global, a JavaScript realm may be deleted while references to it lived on in a BaseShape. This could lead to a use-after-free causing a potentially exploitable crash. This vulnerability affects Firefox ESR < 102.5, Thunderbird < 102.5, and Firefox < 107.

CVE-2023-4056 [CRITICAL] CWE-787 CVE-2023-4056: Memory safety bugs present in Firefox 115, Firefox ESR 115.0, Firefox ESR 102.13, Thunderbird 115.0, Memory safety bugs present in Firefox 115, Firefox ESR 115.0, Firefox ESR 102.13, Thunderbird 115.0, and Thunderbird 102.13. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and

CVE-2009-2468 [CRITICAL] CVE-2009-2468: Integer overflow in Apple CoreGraphics, as used in Safari before 4.0.3, Mozilla Firefox before 3.0.1 Integer overflow in Apple CoreGraphics, as used in Safari before 4.0.3, Mozilla Firefox before 3.0.12, and Mac OS X 10.4.11 and 10.5.8, allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a long text run that triggers a heap-based buffer overflow during font glyph rendering, a related issue to CVE-

CVE-2009-2478 [MEDIUM] CWE-189 CVE-2009-2478: Mozilla Firefox 3.5 allows remote attackers to cause a denial of service (NULL pointer dereference a Mozilla Firefox 3.5 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via unspecified vectors, related to a "flash bug."

CVE-2013-5597 [CRITICAL] CVE-2013-5597: Use-after-free vulnerability in the nsDocLoader::doStopDocumentLoad function in Mozilla Firefox befo Use-after-free vulnerability in the nsDocLoader::doStopDocumentLoad function in Mozilla Firefox before 25.0, Firefox ESR 17.x before 17.0.10 and 24.x before 24.1, Thunderbird before 24.1, Thunderbird ESR 17.x before 17.0.10, and SeaMonkey before 2.22 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via

CVE-2026-6785 [HIGH] CWE-125 CVE-2026-6785: Memory safety bugs present in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox Memory safety bugs present in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149 and Thunderbird 149. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox

CVE-2016-5258 [HIGH] CWE-416 CVE-2016-5258: Use-after-free vulnerability in the WebRTC socket thread in Mozilla Firefox before 48.0 and Firefox Use-after-free vulnerability in the WebRTC socket thread in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows remote attackers to execute arbitrary code by leveraging incorrect free operations on DTLS objects during the shutdown of a WebRTC session.