Mozilla Thunderbird vulnerabilities

CVE-2012-3971 [CRITICAL] CWE-119 CVE-2012-3971: Summer Institute of Linguistics (SIL) Graphite 2, as used in Mozilla Firefox before 15.0, Thunderbir Summer Institute of Linguistics (SIL) Graphite 2, as used in Mozilla Firefox before 15.0, Thunderbird before 15.0, and SeaMonkey before 2.12, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via vectors related to the (1) Silf::readClassMap and (2) Pass::readPass functions.

CVE-2012-3970 [CRITICAL] CWE-399 CVE-2012-3970: Use-after-free vulnerability in the nsTArray_base::Length function in Mozilla Firefox before 15.0, F Use-after-free vulnerability in the nsTArray_base::Length 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 vectors involving movemen

CVE-2020-26971 [HIGH] CWE-787 CVE-2020-26971: Certain blit values provided by the user were not properly constrained leading to a heap buffer over Certain blit values provided by the user were not properly constrained leading to a heap buffer overflow on some video drivers. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

CVE-2020-15678 [HIGH] CWE-416 CVE-2020-15678: When recursing through graphical layers while scrolling, an iterator may have become invalid, result When recursing through graphical layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free. This occurs because the function APZCTreeManager::ComputeClippedCompositionBounds did not follow iterator invalidation rules. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.

CVE-2021-23994 [HIGH] CWE-909 CVE-2021-23994: A WebGL framebuffer was not initialized early enough, resulting in memory corruption and an out of b A WebGL framebuffer was not initialized early enough, resulting in memory corruption and an out of bound write. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.

CVE-2020-26973 [HIGH] CVE-2020-26973: Certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed. Thi Certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed. This could have been used as a sanitizer bypass. 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-2020-26960 [HIGH] CWE-416 CVE-2020-26960: If the Compact() method was called on an nsTArray, the array could have been reallocated without upd If the Compact() method was called on an nsTArray, the array could have been reallocated without updating other pointers, leading to a potential use-after-free and exploitable crash. 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-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-2020-26968 [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-2021-23987 [HIGH] CWE-787 CVE-2021-23987: Mozilla developers and community members reported memory safety bugs present in Firefox 86 and Firef Mozilla developers and community members reported memory safety bugs present in Firefox 86 and Firefox ESR 78.8. 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 ESR < 78.9, Firefox < 87, and Thunderbird < 78.

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-2021-29989 [HIGH] CWE-787 CVE-2021-29989: Mozilla developers reported memory safety bugs present in Firefox 90 and Firefox ESR 78.12. Some of Mozilla developers reported memory safety bugs present in Firefox 90 and Firefox ESR 78.12. 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 < 78.13, Firefox ESR < 78.13, and Firefox < 91.

CVE-2021-38493 [HIGH] CWE-787 CVE-2021-38493: Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. Some of Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. 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 ESR < 78.14, Thunderbird < 78.14, and Firefox < 92.

CVE-2021-29976 [HIGH] CWE-787 CVE-2021-29976: Mozilla developers reported memory safety bugs present in code shared between Firefox and Thunderbir Mozilla developers reported memory safety bugs present in code shared between Firefox and Thunderbird. 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 < 78.12, Firefox ESR < 78.12, and Firefox < 90.

CVE-2021-38510 [HIGH] CVE-2021-38510: The executable file warning was not presented when downloading .inetloc files, which, due to a flaw The executable file warning was not presented when downloading .inetloc files, which, due to a flaw in Mac OS, can run commands on a user's computer.*Note: This issue only affected Mac OS operating systems. Other operating systems are unaffected.*. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

CVE-2025-8037 [CRITICAL] CWE-614 CVE-2025-8037: Setting a nameless cookie with an equals sign in the value shadowed other cookies. Even if the namel Setting a nameless cookie with an equals sign in the value shadowed other cookies. Even if the nameless cookie was set over HTTP and the shadowed cookie included the `Secure` attribute. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.

CVE-2017-5469 [CRITICAL] CVE-2017-5469: Fixed potential buffer overflows in generated Firefox code due to CVE-2016-6354 issue in Flex. This Fixed potential buffer overflows in generated Firefox code due to CVE-2016-6354 issue in Flex. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.