Mozilla Thunderbird vulnerabilities

CVE-2026-92052 [HIGH] CWE-457 CVE-2026-92052: Privilege escalation due to uninitialized memory in the Graphics: CanvasWebGL component. This vulner Privilege escalation due to uninitialized memory in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

CVE-2026-92062 [HIGH] CWE-269 CVE-2026-92062: Privilege escalation in the Session Restore component. This vulnerability was fixed in Firefox 156, Privilege escalation in the Session Restore component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

CVE-2014-1567 [CRITICAL] CVE-2014-1567: Use-after-free vulnerability in DirectionalityUtils.cpp in Mozilla Firefox before 32.0, Firefox ESR Use-after-free vulnerability in DirectionalityUtils.cpp in Mozilla Firefox before 32.0, Firefox ESR 24.x before 24.8 and 31.x before 31.1, and Thunderbird 24.x before 24.8 and 31.x before 31.1 allows remote attackers to execute arbitrary code via text that is improperly handled during the interaction between directionality resolution and layout.

CVE-2026-4687 [HIGH] CVE-2026-4687: Sandbox escape due to incorrect boundary conditions in the Telemetry component Sandbox escape due to incorrect boundary conditions in the Telemetry component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.

CVE-2012-3969 [CRITICAL] CWE-189 CVE-2012-3969: Integer overflow in the nsSVGFEMorphologyElement::Filter function in Mozilla Firefox before 15.0, Fi Integer overflow in the nsSVGFEMorphologyElement::Filter function in Mozilla Firefox before 15.0, Firefox ESR 10.x before 10.0.7, Thunderbird before 15.0, Thunderbird ESR 10.x before 10.0.7, and SeaMonkey before 2.12 allows remote attackers to execute arbitrary code via a crafted SVG filter that triggers an incorrect sum calculation, leading to a he

CVE-2009-1841 [CRITICAL] CWE-94 CVE-2009-1841: js/src/xpconnect/src/xpcwrappedjsclass.cpp in Mozilla Firefox before 3.0.11, Thunderbird before 2.0. js/src/xpconnect/src/xpcwrappedjsclass.cpp in Mozilla Firefox before 3.0.11, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.17 allows remote attackers to execute arbitrary web script with the privileges of a chrome object, as demonstrated by the browser sidebar and the FeedWriter.

CVE-2012-1958 [CRITICAL] CWE-399 CVE-2012-1958: Use-after-free vulnerability in the nsGlobalWindow::PageHidden function in Mozilla Firefox 4.x throu Use-after-free vulnerability in the nsGlobalWindow::PageHidden 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 might allow remote attackers to execute arbitrary code via vectors related to focused content.

CVE-2017-5438 [CRITICAL] CWE-416 CVE-2017-5438: A use-after-free vulnerability during XSLT processing due to the result handler being held by a free A use-after-free vulnerability during XSLT processing due to the result handler being held by a freed handler during handling. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

CVE-2018-12392 [CRITICAL] CVE-2018-12392: When manipulating user events in nested loops while opening a document through script, it is possibl When manipulating user events in nested loops while opening a document through script, it is possible to trigger a potentially exploitable crash due to poor event handling. This vulnerability affects Firefox < 63, Firefox ESR < 60.3, and Thunderbird < 60.3.

CVE-2010-3180 [CRITICAL] CWE-399 CVE-2010-3180: Use-after-free vulnerability in the nsBarProp function in Mozilla Firefox before 3.5.14 and 3.6.x be Use-after-free vulnerability in the nsBarProp function in Mozilla Firefox before 3.5.14 and 3.6.x before 3.6.11, Thunderbird before 3.0.9 and 3.1.x before 3.1.5, and SeaMonkey before 2.0.9 allows remote attackers to execute arbitrary code by accessing the locationbar property of a closed window.

CVE-2025-6432 [HIGH] CVE-2025-6432: When Multi-Account Containers was enabled, DNS requests could have bypassed a SOCKS proxy when the domain name was invalid or the SOCKS proxy was not When Multi-Account Containers was enabled, DNS requests could have bypassed a SOCKS proxy when the domain name was invalid or the SOCKS proxy was not responding. This vulnerability affects Firefox < 140 and Thunderbird < 140.

CVE-2017-7818 [CRITICAL] CWE-416 CVE-2017-7818: A use-after-free vulnerability can occur when manipulating arrays of Accessible Rich Internet Applic A use-after-free vulnerability can occur when manipulating arrays of Accessible Rich Internet Applications (ARIA) elements within containers through the DOM. This results in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

CVE-2013-0745 [CRITICAL] CWE-94 CVE-2013-0745: The AutoWrapperChanger class in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.2, Thunder The AutoWrapperChanger class 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 properly interact with garbage collection, which allows remote attackers to execute arbitrary code via a crafted HTML document referencing JavaScript objects.

CVE-2012-1946 [CRITICAL] CWE-399 CVE-2012-1946: Use-after-free vulnerability in the nsINode::ReplaceOrInsertBefore function in Mozilla Firefox 4.x t Use-after-free vulnerability in the nsINode::ReplaceOrInsertBefore function in Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10 might allow remote attackers to execute arbitrary code via document changes involving replacement or insertion of

CVE-2017-5460 [CRITICAL] CWE-416 CVE-2017-5460: A use-after-free vulnerability in frame selection triggered by a combination of malicious script con A use-after-free vulnerability in frame selection triggered by a combination of malicious script content and key presses by a user. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

CVE-2024-2612 [HIGH] CWE-416 CVE-2024-2612: If an attacker could find a way to trigger a particular code path in `SafeRefPtr`, it could have tri If an attacker could find a way to trigger a particular code path in `SafeRefPtr`, it could have triggered a crash or potentially be leveraged to achieve code execution. This vulnerability affects Firefox < 124, Firefox ESR < 115.9, and Thunderbird < 115.9.

CVE-2014-1564 [MEDIUM] CWE-824 CVE-2014-1564: Mozilla Firefox before 32.0, Firefox ESR 31.x before 31.1, and Thunderbird 31.x before 31.1 do not p Mozilla Firefox before 32.0, Firefox ESR 31.x before 31.1, and Thunderbird 31.x before 31.1 do not properly initialize memory for GIF rendering, which allows remote attackers to obtain sensitive information from process memory via crafted web script that interacts with a CANVAS element associated with a malformed GIF image.

CVE-2010-2760 [CRITICAL] CVE-2010-2760: Use-after-free vulnerability in the nsTreeSelection function in Mozilla Firefox before 3.5.12 and 3. Use-after-free vulnerability in the nsTreeSelection function in Mozilla Firefox before 3.5.12 and 3.6.x before 3.6.9, Thunderbird before 3.0.7 and 3.1.x before 3.1.3, and SeaMonkey before 2.0.7 might allow remote attackers to execute arbitrary code via vectors involving a XUL tree selection, related to a "dangling pointer vulnerability." NOTE: this issue ex

CVE-2026-110247 Mozilla Foundation Security Advisory 2026-109: CVE-2026-110247 Mozilla Foundation Security Advisory 2026-109 CVE: CVE-2026-110247 Product: Thunderbird Impact: low Fixed in: Thunderbird 158

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.