Mozilla Thunderbird vulnerabilities

CVE-2012-1972 [CRITICAL] CWE-416 CVE-2012-1972: Use-after-free vulnerability in the nsHTMLEditor::CollapseAdjacentTextNodes function in Mozilla Fire Use-after-free vulnerability in the nsHTMLEditor::CollapseAdjacentTextNodes 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 or cause a denial of service (heap memory corruption) via unspeci

CVE-2012-1973 [CRITICAL] CWE-416 CVE-2012-1973: Use-after-free vulnerability in the nsObjectLoadingContent::LoadObject function in Mozilla Firefox b Use-after-free vulnerability in the nsObjectLoadingContent::LoadObject 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 or cause a denial of service (heap memory corruption) via unspecified

CVE-2012-1974 [CRITICAL] CWE-416 CVE-2012-1974: Use-after-free vulnerability in the gfxTextRun::CanBreakLineBefore function in Mozilla Firefox befor Use-after-free vulnerability in the gfxTextRun::CanBreakLineBefore 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 or cause a denial of service (heap memory corruption) via unspecified vect

CVE-2025-14332 [HIGH] CWE-787 CVE-2025-14332: Memory safety bugs present in Firefox 145 and Thunderbird 145. Some of these bugs showed evidence of Memory safety bugs present in Firefox 145 and Thunderbird 145. 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 146 and Thunderbird 146.

CVE-2026-6751 [HIGH] CWE-457 CVE-2026-6751: Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firef Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

CVE-2026-6753 [HIGH] CWE-119 CVE-2026-6753: Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

CVE-2012-1951 [CRITICAL] CWE-399 CVE-2012-1951: Use-after-free vulnerability in the nsSMILTimeValueSpec::IsEventBased function in Mozilla Firefox 4. Use-after-free vulnerability in the nsSMILTimeValueSpec::IsEventBased 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 allows remote attackers to cause a denial of service (heap memory corruption) or possibly execute arbitrary cod

CVE-2013-1677 [CRITICAL] CWE-399 CVE-2013-1677: The gfxSkipCharsIterator::SetOffsets function in Mozilla Firefox before 21.0, Firefox ESR 17.x befor The gfxSkipCharsIterator::SetOffsets function in Mozilla Firefox before 21.0, Firefox ESR 17.x before 17.0.6, Thunderbird before 17.0.6, and Thunderbird ESR 17.x before 17.0.6 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via unspecified vectors.

CVE-2026-12324 [HIGH] CWE-703 CVE-2026-12324: Incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed i Incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

CVE-2012-3960 [CRITICAL] CWE-416 CVE-2012-3960: Use-after-free vulnerability in the mozSpellChecker::SetCurrentDictionary function in Mozilla Firefo Use-after-free vulnerability in the mozSpellChecker::SetCurrentDictionary 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 or cause a denial of service (heap memory corruption) via unspecifi

CVE-2026-109734 Mozilla Foundation Security Advisory 2026-109: CVE-2026-109734 Mozilla Foundation Security Advisory 2026-109 CVE: CVE-2026-109734 Product: Thunderbird Impact: low Fixed in: Thunderbird 158

CVE-2026-109744 Mozilla Foundation Security Advisory 2026-110: CVE-2026-109744 Mozilla Foundation Security Advisory 2026-110 CVE: CVE-2026-109744 Product: Thunderbird Impact: low Fixed in: Thunderbird 153.5

CVE-2026-109746 Mozilla Foundation Security Advisory 2026-109: CVE-2026-109746 Mozilla Foundation Security Advisory 2026-109 CVE: CVE-2026-109746 Product: Thunderbird Impact: low Fixed in: Thunderbird 158

CVE-2026-109757 Mozilla Foundation Security Advisory 2026-110: CVE-2026-109757 Mozilla Foundation Security Advisory 2026-110 CVE: CVE-2026-109757 Product: Thunderbird Impact: low Fixed in: Thunderbird 153.5

CVE-2013-5590 [CRITICAL] CVE-2013-5590: Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 25.0, Firefox E Multiple unspecified vulnerabilities in the browser engine 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 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary co

CVE-2012-3964 [CRITICAL] CWE-399 CVE-2012-3964: Use-after-free vulnerability in the gfxTextRun::GetUserData function in Mozilla Firefox before 15.0, Use-after-free vulnerability in the gfxTextRun::GetUserData 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 or cause a denial of service (heap memory corruption) via unspecified vectors.

CVE-2019-11752 [HIGH] CWE-416 CVE-2019-11752: It is possible to delete an IndexedDB key value and subsequently try to extract it during conversion It is possible to delete an IndexedDB key value and subsequently try to extract it during conversion. This results in a use-after-free and a potentially exploitable crash. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.

CVE-2015-4509 [HIGH] CVE-2015-4509: Use-after-free vulnerability in the HTMLVideoElement interface in Mozilla Firefox before 41 Use-after-free vulnerability in the HTMLVideoElement interface in Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3 allows remote attackers to execute arbitrary code via crafted JavaScript code that modifies the URI table of a media element, aka ZDI-CAN-3176.

CVE-2019-17012 [HIGH] CWE-787 CVE-2019-17012: Mozilla developers reported memory safety bugs present in Firefox 70 and Firefox ESR 68.2. Some of t Mozilla developers reported memory safety bugs present in Firefox 70 and Firefox ESR 68.2. 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 Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

CVE-2014-1477 [CRITICAL] CVE-2014-1477: Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 27.0, Firefox E Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, 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 unknown vectors.