Mozilla Thunderbird vulnerabilities

CVE-2013-1736 [CRITICAL] CWE-119 CVE-2013-1736: The nsGfxScrollFrameInner::IsLTR function in Mozilla Firefox before 24.0, Firefox ESR 17.x before 17 The nsGfxScrollFrameInner::IsLTR function in Mozilla Firefox before 24.0, Firefox ESR 17.x before 17.0.9, Thunderbird before 24.0, Thunderbird ESR 17.x before 17.0.9, and SeaMonkey before 2.21 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to improperly establishing parent-child

CVE-2013-5602 [CRITICAL] CWE-119 CVE-2013-5602: The Worker::SetEventListener function in the Web workers implementation in Mozilla Firefox before 25 The Worker::SetEventListener function in the Web workers implementation 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 (memory corruption) via ve

CVE-2026-16392 Mozilla Foundation Security Advisory 2026-71: CVE-2026-16392 Mozilla Foundation Security Advisory 2026-71 CVE: CVE-2026-16392 Product: Thunderbird Impact: high Fixed in: Thunderbird 153

CVE-2018-12391 [HIGH] CWE-863 CVE-2018-12391: During HTTP Live Stream playback on Firefox for Android, audio data can be accessed across origins i During HTTP Live Stream playback on Firefox for Android, audio data can be accessed across origins in violation of security policies. Because the problem is in the underlying Android service, this issue is addressed by treating all HLS streams as cross-origin and opaque to access. *Note: this issue only affects Firefox for Android. Desktop versions of

CVE-2012-4187 [CRITICAL] CWE-119 CVE-2012-4187: Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ES Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 do not properly manage a certain insPos variable, which allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption and assertion failure) via unspecified vecto

CVE-2006-1726 [CRITICAL] CWE-264 CVE-2006-1726: Unspecified vulnerability in Firefox and Thunderbird 1.5 before 1.5.0.2, and SeaMonkey before 1.0.1, Unspecified vulnerability in Firefox and Thunderbird 1.5 before 1.5.0.2, and SeaMonkey before 1.0.1, allows remote attackers to bypass the js_ValueToFunctionObject check and execute arbitrary code via unknown vectors involving setTimeout and Firefox' ForEach method.

CVE-2014-1550 [CRITICAL] CVE-2014-1550: Use-after-free vulnerability in the MediaInputPort class in Mozilla Firefox before 31.0 and Thunderb Use-after-free vulnerability in the MediaInputPort class in Mozilla Firefox before 31.0 and Thunderbird before 31.0 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) by leveraging incorrect Web Audio control-message ordering.

CVE-2019-17008 [HIGH] CWE-416 CVE-2019-17008: When using nested workers, a use-after-free could occur during worker destruction. This resulted in When using nested workers, a use-after-free could occur during worker destruction. This resulted in a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

CVE-2008-4058 [HIGH] CWE-264 CVE-2008-4058: The XPConnect component in Mozilla Firefox before 2.0.0.17 and 3.x before 3.0.2, Thunderbird before The XPConnect component in Mozilla Firefox before 2.0.0.17 and 3.x before 3.0.2, Thunderbird before 2.0.0.17, and SeaMonkey before 1.1.12 allows remote attackers to "pollute XPCNativeWrappers" and execute arbitrary code with chrome privileges via vectors related to (1) chrome XBL and (2) chrome JS.

CVE-2014-1576 [HIGH] CWE-119 CVE-2014-1576: Heap-based buffer overflow in the nsTransformedTextRun function in Mozilla Firefox before 33.0, Fire Heap-based buffer overflow in the nsTransformedTextRun function in Mozilla Firefox before 33.0, Firefox ESR 31.x before 31.2, and Thunderbird 31.x before 31.2 allows remote attackers to execute arbitrary code via Cascading Style Sheets (CSS) token sequences that trigger changes to capitalization style.

CVE-2021-23978 [HIGH] CWE-787 CVE-2021-23978: Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. Some of t Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. 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 < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.

CVE-2020-15656 [HIGH] CWE-843 CVE-2020-15656: JIT optimizations involving the Javascript arguments object could confuse later optimizations. This JIT optimizations involving the Javascript arguments object could confuse later optimizations. This risk was already mitigated by various precautions in the code, resulting in this bug rated at only moderate severity. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

CVE-2020-26968 [HIGH] CWE-787 CVE-2020-26968: Mozilla developers reported memory safety bugs present in Firefox 82 and Firefox ESR 78.4. Some of t Mozilla developers reported memory safety bugs present in Firefox 82 and Firefox ESR 78.4. 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 < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CVE-2020-26974 [HIGH] CWE-787 CVE-2020-26974: When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrec When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

CVE-2020-35113 [HIGH] CWE-787 CVE-2020-35113: Mozilla developers reported memory safety bugs present in Firefox 83 and Firefox ESR 78.5. Some of t Mozilla developers reported memory safety bugs present in Firefox 83 and Firefox ESR 78.5. 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 < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

CVE-2021-23999 [HIGH] CWE-269 CVE-2021-23999: If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the Sys If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.

CVE-2021-23964 [HIGH] CWE-787 CVE-2021-23964: Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. Some of t Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. 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 < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.

CVE-2021-38500 [HIGH] CVE-2021-38500: Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. Some of t Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. 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 < 78.15, Thunderbird < 91.2, Firefox ESR < 91.2, Firefox ESR < 78.15, and

CVE-2021-43534 [HIGH] CWE-787 CVE-2021-43534: Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firef Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. 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 Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.

CVE-2021-23960 [HIGH] CVE-2021-23960: Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, a Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.