Debian Firefox-Esr vulnerabilities

CVE-2026-2771 [CRITICAL] CVE-2026-2771: firefox - Undefined behavior in the DOM: Core & HTML component. This vulnerability affects... Undefined behavior in the DOM: Core & HTML 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-2026-2757 [CRITICAL] CVE-2026-2757: firefox - Incorrect boundary conditions in the WebRTC: Audio/Video component. This vulnera... Incorrect boundary conditions in the WebRTC: Audio/Video 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-2026-2785 [CRITICAL] CVE-2026-2785: firefox - Invalid pointer in the JavaScript Engine component. This vulnerability affects F... Invalid pointer in the JavaScript Engine 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-2026-2758 [CRITICAL] CVE-2026-2758: firefox - Use-after-free in the JavaScript: GC component. This vulnerability affects Firef... Use-after-free in the JavaScript: GC 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-2024-9392 [CRITICAL] CVE-2024-9392: firefox - A compromised content process could have allowed for the arbitrary loading of cr... A compromised content process could have allowed for the arbitrary loading of cross-origin pages. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Firefox ESR < 115.16, Thunderbird < 128.3, and Thunderbird < 131. Scope: local sid: resolved (fixed in 131.0-1)

CVE-2025-8031 [CRITICAL] CVE-2025-8031: firefox - The `username:password` part was not correctly stripped from URLs in CSP reports... The `username:password` part was not correctly stripped from URLs in CSP reports potentially leaking HTTP Basic Authentication credentials. This vulnerability affects Firefox < 141, Firefox ESR < 128.13, Firefox ESR < 140.1, Thunderbird < 141, Thunderbird < 128.13, and Thunderbird < 140.1. Scope: local sid: resolved (fixed in 141.0-1)

CVE-2026-4691 [CRITICAL] CVE-2026-4691: firefox - Use-after-free in the CSS Parsing and Computation component. This vulnerability ... Use-after-free in the CSS Parsing and Computation 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-2026-2759 [CRITICAL] CVE-2026-2759: firefox - Incorrect boundary conditions in the Graphics: ImageLib component. This vulnerab... Incorrect boundary conditions in the Graphics: ImageLib 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-2026-4721 [CRITICAL] CVE-2026-4721: firefox - Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird... Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. 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 < 149, Firefox ESR < 115.34, Firefox ESR < 140.9

CVE-2026-4710 [CRITICAL] CVE-2026-4710: firefox - Incorrect boundary conditions in the Audio/Video component. This vulnerability a... Incorrect boundary conditions in the Audio/Video 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-2026-2793 [CRITICAL] CVE-2026-2793: firefox - Memory safety bugs present in Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird... Memory safety bugs present in Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147. 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 < 148, Firefox ESR < 115.33, Firefox ESR < 140.8

CVE-2026-5731 [CRITICAL] CVE-2026-5731: firefox - Memory safety bugs present in Firefox ESR 115.34.0, Firefox ESR 140.9.0, Thunder... Memory safety bugs present in Firefox ESR 115.34.0, Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. 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 Firefox < 149.0.2, Firefox ESR < 115.34.1,

CVE-2024-29944 [HIGH] CVE-2024-29944: firefox - An attacker was able to inject an event handler into a privileged object that wo... An attacker was able to inject an event handler into a privileged object that would allow arbitrary JavaScript execution in the parent process. Note: This vulnerability affects Desktop Firefox only, it does not affect mobile versions of Firefox. This vulnerability affects Firefox < 124.0.1 and Firefox ESR < 115.9.1. Scope: local sid: resolved (fixed in 124.0.1-1)

CVE-2025-14321 [CRITICAL] CVE-2025-14321: firefox - Use-after-free in the WebRTC: Signaling component. This vulnerability affects Fi... Use-after-free in the WebRTC: Signaling component. This vulnerability affects Firefox < 146, Firefox ESR < 140.6, Thunderbird < 146, and Thunderbird < 140.6. Scope: local sid: resolved (fixed in 146.0-1)

CVE-2026-0879 [CRITICAL] CVE-2026-0879: firefox - Sandbox escape due to incorrect boundary conditions in the Graphics component. T... Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7. Scope: local sid: resolved (fixed in 147.0-1)

CVE-2026-2767 [CRITICAL] CVE-2026-2767: firefox - Use-after-free in the JavaScript: WebAssembly component. This vulnerability affe... Use-after-free in the JavaScript: WebAssembly 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-2026-4720 [CRITICAL] CVE-2026-4720: firefox - Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox ... Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. 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 < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140

CVE-2026-2792 [CRITICAL] CVE-2026-2792: firefox - Memory safety bugs present in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox ... Memory safety bugs present in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147. 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 < 148, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140

CVE-2026-5734 [CRITICAL] CVE-2026-5734: firefox - Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Fire... Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. 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 Firefox < 149.0.2, Firefox ESR < 140.9.1, Thunderbird < 149.0.2,

CVE-2017-5461 [CRITICAL] CVE-2017-5461: firefox - Mozilla Network Security Services (NSS) before 3.21.4, 3.22.x through 3.28.x bef... Mozilla Network Security Services (NSS) before 3.21.4, 3.22.x through 3.28.x before 3.28.4, 3.29.x before 3.29.5, and 3.30.x before 3.30.1 allows remote attackers to cause a denial of service (out-of-bounds write) or possibly have unspecified other impact by leveraging incorrect base64 operations. Scope: local sid: resolved (fixed in 52.0.1-1)