Mozilla Thunderbird vulnerabilities

CVE-2007-3845 [CRITICAL] CVE-2007-3845: Mozilla Firefox before 2.0.0.6, Thunderbird before 1.5.0.13 and 2.x before 2.0.0.6, and SeaMonkey be Mozilla Firefox before 2.0.0.6, Thunderbird before 1.5.0.13 and 2.x before 2.0.0.6, and SeaMonkey before 1.1.4 allow remote attackers to execute arbitrary commands via certain vectors associated with launching "a file handling program based on the file extension at the end of the URI," a variant of CVE-2007-4041. NOTE: the vendor states that "it is still po

CVE-2023-6856 [HIGH] CWE-787 CVE-2023-6856: The WebGL `DrawElementsInstanced` method was susceptible to a heap buffer overflow when used on syst The WebGL `DrawElementsInstanced` method was susceptible to a heap buffer overflow when used on systems with the Mesa VM driver. This issue could allow an attacker to perform remote code execution and sandbox escape. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

CVE-2019-9816 [MEDIUM] CWE-843 CVE-2019-9816: A possible vulnerability exists where type confusion can occur when manipulating JavaScript objects A possible vulnerability exists where type confusion can occur when manipulating JavaScript objects in object groups, allowing for the bypassing of security checks within these groups. *Note: this vulnerability has only been demonstrated with UnboxedObjects, which are disabled by default on all supported releases.*. This vulnerability affects Thunderbi

CVE-2022-2200 [HIGH] CWE-1321 CVE-2022-2200: If an object prototype was corrupted by an attacker, they would have been able to set undesired attr If an object prototype was corrupted by an attacker, they would have been able to set undesired attributes on a JavaScript object, leading to privileged code execution. This vulnerability affects Firefox < 102, Firefox ESR < 91.11, Thunderbird < 102, and Thunderbird < 91.11.

CVE-2007-0009 [MEDIUM] CWE-119 CVE-2007-0009: Stack-based buffer overflow in the SSLv2 support in Mozilla Network Security Services (NSS) before 3 Stack-based buffer overflow in the SSLv2 support in Mozilla Network Security Services (NSS) before 3.11.5, as used by Firefox before 1.5.0.10 and 2.x before 2.0.0.2, Thunderbird before 1.5.0.10, SeaMonkey before 1.0.8, and certain Sun Java System server products before 20070611, allows remote attackers to execute arbitrary code via invalid "Client Mas

CVE-2004-0648 [CRITICAL] CVE-2004-0648: Mozilla (Suite) before 1.7.1, Firefox before 0.9.2, and Thunderbird before 0.7.2 allow remote attack Mozilla (Suite) before 1.7.1, Firefox before 0.9.2, and Thunderbird before 0.7.2 allow remote attackers to launch arbitrary programs via a URI referencing the shell: protocol.

CVE-2006-4253 [HIGH] CVE-2006-4253: Concurrency vulnerability in Mozilla Firefox 1 Concurrency vulnerability in Mozilla Firefox 1.5.0.6 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via multiple Javascript timed events that load a deeply nested XML file, followed by redirecting the browser to another page, which leads to a concurrency failure that causes structures to be freed incorrectly, as demonstrated by (1) ffoxdie and (2) ffoxd

CVE-2014-1512 [CRITICAL] CWE-416 CVE-2014-1512: Use-after-free vulnerability in the TypeObject class in the JavaScript engine in Mozilla Firefox bef Use-after-free vulnerability in the TypeObject class in the JavaScript engine in Mozilla Firefox before 28.0, Firefox ESR 24.x before 24.4, Thunderbird before 24.4, and SeaMonkey before 2.25 allows remote attackers to execute arbitrary code by triggering extensive memory consumption while garbage collection is occurring, as demonstrated by improper

CVE-2006-0884 [CRITICAL] CWE-20 CVE-2006-0884: The WYSIWYG rendering engine ("rich mail" editor) in Mozilla Thunderbird 1.0.7 and earlier allows us The WYSIWYG rendering engine ("rich mail" editor) in Mozilla Thunderbird 1.0.7 and earlier allows user-assisted attackers to bypass javascript security settings and obtain sensitive information or cause a crash via an e-mail containing a javascript URI in the SRC attribute of an IFRAME tag, which is executed when the user edits the e-mail.

CVE-2025-4918 [CRITICAL] CWE-125 CVE-2025-4918: An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. Thi An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.

CVE-2026-16367 [CRITICAL] CWE-119 CVE-2026-16367: Sandbox escape due to invalid pointer in the Disability Access APIs component. This vulnerability wa Sandbox escape due to invalid pointer in the Disability Access APIs component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

CVE-2018-18505 [CRITICAL] CVE-2018-18505: An earlier fix for an Inter-process Communication (IPC) vulnerability, CVE-2011-3079, added authenti An earlier fix for an Inter-process Communication (IPC) vulnerability, CVE-2011-3079, added authentication to communication between IPC endpoints and server parents during IPC process creation. This authentication is insufficient for channels created after the IPC process is started, leading to the authentication not being correctly applied to later chann

CVE-2024-8381 [CRITICAL] CWE-843 CVE-2024-8381: A potentially exploitable type confusion could be triggered when looking up a property name on an ob A potentially exploitable type confusion could be triggered when looking up a property name on an object being used as the `with` environment. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, Firefox ESR < 115.15, Thunderbird < 128.2, and Thunderbird < 115.15.

CVE-2021-38503 [CRITICAL] CWE-863 CVE-2021-38503: The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypas The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or navigating the top-level frame. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

CVE-2026-4688 [CRITICAL] CVE-2026-4688: Sandbox escape due to use-after-free in the Disability Access APIs component Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.

CVE-2026-2768 [CRITICAL] CWE-284 CVE-2026-2768: Sandbox escape in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 148, Fir Sandbox escape in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

CVE-2026-0881 [CRITICAL] CWE-284 CVE-2026-0881: Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Th Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.

CVE-2026-16383 [CRITICAL] CWE-693 CVE-2026-16383: Mitigation bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 153, Fir Mitigation bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

CVE-2026-16360 [CRITICAL] CWE-119 CVE-2026-16360: Memory safety bugs present in Firefox ESR 115.37, Firefox ESR 140.12 and Firefox 152. Some of these Memory safety bugs present in Firefox ESR 115.37, Firefox ESR 140.12 and Firefox 152. 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 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and

CVE-2026-16361 [CRITICAL] CWE-119 CVE-2026-16361: Memory safety bugs present in Thunderbird ESR 140.12. Some of these bugs showed evidence of memory c Memory safety bugs present in Thunderbird ESR 140.12. 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 was fixed in Firefox ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13.