Debian Firefox vulnerabilities

CVE-2019-9816 [MEDIUM] CVE-2019-9816: firefox - A possible vulnerability exists where type confusion can occur when manipulating... 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 Thunderbird < 60.7, Fir

CVE-2022-2200 [HIGH] CVE-2022-2200: firefox - If an object prototype was corrupted by an attacker, they would have been able t... 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. Scope: local sid: resolved (fixed in 102.0-1)

CVE-2006-4253 [HIGH] CVE-2006-4253: firefox - Concurrency vulnerability in Mozilla Firefox 1.5.0.6 and earlier allows remote a... 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 incorrectl

CVE-2006-0884 [CRITICAL] CVE-2006-0884: firefox - The WYSIWYG rendering engine ("rich mail" editor) in Mozilla Thunderbird 1.0.7 a... 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. Scope: local sid: resolv

CVE-2025-4918 [CRITICAL] CVE-2025-4918: firefox - An attacker was able to perform an out-of-bounds read or write on a JavaScript `... An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. This vulnerability affects Firefox < 138.0.4, Firefox ESR < 128.10.1, Firefox ESR < 115.23.1, Thunderbird < 128.10.2, and Thunderbird < 138.0.2. Scope: local sid: resolved (fixed in 138.0.4-1)

CVE-2018-18505 [CRITICAL] CVE-2018-18505: firefox - An earlier fix for an Inter-process Communication (IPC) vulnerability, CVE-2011-... 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 channels. Th

CVE-2021-38503 [CRITICAL] CVE-2021-38503: firefox - The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowin... 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. Scope: local sid: resolved (fixed in 94.0-1)

CVE-2019-25136 [CRITICAL] CVE-2019-25136: firefox - A compromised child process could have injected XBL Bindings into privileged CSS... A compromised child process could have injected XBL Bindings into privileged CSS rules, resulting in arbitrary code execution and a sandbox escape. This vulnerability affects Firefox < 70. Scope: local sid: resolved (fixed in 70.0-1)

CVE-2026-4688 [CRITICAL] CVE-2026-4688: firefox - Sandbox escape due to use-after-free in the Disability Access APIs component. Th... 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. Scope: local sid: resolved (fixed in 149.0-1)

CVE-2026-2768 [CRITICAL] CVE-2026-2768: firefox - Sandbox escape in the Storage: IndexedDB component. This vulnerability affects F... Sandbox escape in the Storage: IndexedDB component. This vulnerability affects Firefox < 148, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8. Scope: local sid: resolved (fixed in 148.0-1)

CVE-2026-0881 [CRITICAL] CVE-2026-0881: firefox - Sandbox escape in the Messaging System component. This vulnerability affects Fir... Sandbox escape in the Messaging System component. This vulnerability affects Firefox < 147 and Thunderbird < 147. Scope: local sid: resolved (fixed in 147.0-1)

CVE-2024-8381 [CRITICAL] CVE-2024-8381: firefox - A potentially exploitable type confusion could be triggered when looking up a pr... 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. Scope: local sid: resolved (fixed in 130.0-1)

CVE-2026-4692 [CRITICAL] CVE-2026-4692: firefox - Sandbox escape in the Responsive Design Mode component. This vulnerability affec... Sandbox escape in the Responsive Design Mode component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9. Scope: local sid: resolved (fixed in 149.0-1)

CVE-2026-2776 [CRITICAL] CVE-2026-2776: firefox - Sandbox escape due to incorrect boundary conditions in the Telemetry component i... Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8. Scope: local sid: resolved (fixed in 148.0-1)

CVE-2026-2761 [CRITICAL] CVE-2026-2761: firefox - Sandbox escape in the Graphics: WebRender component. This vulnerability affects ... Sandbox escape in the Graphics: WebRender component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8. Scope: local sid: resolved (fixed in 148.0-1)

CVE-2026-2760 [CRITICAL] CVE-2026-2760: firefox - Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender c... Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8. Scope: local sid: resolved (fixed in 148.0-1)

CVE-2025-4919 [HIGH] CVE-2025-4919: firefox - An attacker was able to perform an out-of-bounds read or write on a JavaScript o... An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability affects Firefox < 138.0.4, Firefox ESR < 128.10.1, Firefox ESR < 115.23.1, Thunderbird < 128.10.2, and Thunderbird < 138.0.2. Scope: local sid: resolved (fixed in 138.0.4-1)

CVE-2025-0247 [CRITICAL] CVE-2025-0247: firefox - Memory safety bugs present in Firefox 133 and Thunderbird 133. Some of these bug... Memory safety bugs present in Firefox 133 and Thunderbird 133. 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 < 134 and Thunderbird < 134. Scope: local sid: resolved (fixed in 134.0-1)

CVE-2025-6424 [CRITICAL] CVE-2025-6424: firefox - A use-after-free in FontFaceSet resulted in a potentially exploitable crash. Thi... A use-after-free in FontFaceSet resulted in a potentially exploitable crash. This vulnerability affects Firefox < 140, Firefox ESR < 115.25, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12. Scope: local sid: resolved (fixed in 140.0-1)

CVE-2016-0718 [CRITICAL] CVE-2016-0718: expat - Expat allows context-dependent attackers to cause a denial of service (crash) or... Expat allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a malformed input document, which triggers a buffer overflow. Scope: local bookworm: resolved (fixed in 2.1.1-2) bullseye: resolved (fixed in 2.1.1-2) forky: resolved (fixed in 2.1.1-2) sid: resolved (fixed in 2.1.1-2) trixie: resolved (fixed in 2.1.1