| CVE-2026-4721 | 9.8 | — | — | — | mozilla / firefox | Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunder | 211d ago |
| CVE-2026-4720 | 9.8 | — | — | — | mozilla / firefox | Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. | 211d ago |
| CVE-2026-4717 | 9.8 | — | — | — | mozilla / firefox | Privilege escalation in the Netmonitor component. | 211d ago |
| CVE-2026-4711 | 9.8 | — | — | — | mozilla / firefox | Use-after-free in the Widget: Cocoa component. | 211d ago |
| CVE-2026-4710 | 9.8 | — | — | — | mozilla / firefox | Incorrect boundary conditions in the Audio/Video component. | 211d ago |
| CVE-2026-4705 | 9.8 | — | — | — | mozilla / firefox | Undefined behavior in the WebRTC: Signaling component. | 211d ago |
| CVE-2026-4702 | 9.8 | — | — | — | mozilla / firefox | JIT miscompilation in the JavaScript Engine component. | 211d ago |
| CVE-2026-4701 | 9.8 | — | — | — | mozilla / firefox | Use-after-free in the JavaScript Engine component. | 211d ago |
| CVE-2026-4700 | 9.8 | — | — | — | mozilla / firefox | Mitigation bypass in the Networking: HTTP component. | 211d ago |
| CVE-2026-4698 | 9.8 | — | — | — | mozilla / firefox | JIT miscompilation in the JavaScript Engine: JIT component. | 211d ago |
| CVE-2026-4696 | 9.8 | — | — | — | mozilla / firefox | Use-after-free in the Layout: Text and Fonts component. | 211d ago |
| CVE-2026-4691 | 9.8 | — | — | — | mozilla / firefox | Use-after-free in the CSS Parsing and Computation component. | 211d ago |
| CVE-2026-84121 | 9.6 | — | — | — | mozilla / firefox | Sandbox escape due to use-after-free in the DOM: Security component. | 50d ago |
| CVE-2026-84119 | 9.6 | — | — | — | mozilla / firefox | Sandbox escape due to use-after-free in the DOM: Navigation component. | 50d ago |
| CVE-2026-12297 | 9.6 | — | — | — | mozilla / firefox | Sandbox escape due to incorrect boundary conditions in the Networking component. | 127d ago |
| CVE-2026-12296 | 9.6 | — | — | — | mozilla / firefox | Sandbox escape in the Security: Process Sandboxing component. | 127d ago |
| CVE-2026-12295 | 9.6 | — | — | — | mozilla / firefox | Sandbox escape in the DOM: Navigation component. | 127d ago |
| CVE-2026-12294 | 9.6 | — | — | — | mozilla / firefox | Sandbox escape in the DOM: Workers component. | 127d ago |
| CVE-2026-8959 | 9.6 | — | — | — | mozilla / firefox | Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. | 155d ago |
| CVE-2026-8953 | 9.6 | — | — | — | mozilla / firefox | Sandbox escape due to use-after-free in the Disability Access APIs component. | 155d ago |
| CVE-2026-8950 | 9.3 | — | — | — | mozilla / firefox | Same-origin policy bypass in the Networking: HTTP component. | 155d ago |
| CVE-2026-84639 | 9.1 | — | — | — | mozilla / thunderbird | Triggering an error condition in certain MIME bodies would cause uninitialized memory to be used. | 50d ago |
| CVE-2026-74986 | 9.1 | — | — | — | mozilla / firefox | Site isolation issue in the CSS Parsing and Computation component. | 64d ago |
| CVE-2026-74961 | 9.1 | — | — | — | mozilla / firefox | Side-channel in the Web Audio component. | 64d ago |
| CVE-2026-74959 | 9.1 | — | — | — | mozilla / firefox | Mitigation bypass in the Storage: Cache API component. | 64d ago |
| CVE-2026-74956 | 9.1 | — | — | — | mozilla / firefox | Same-origin policy bypass in the DOM: Service Workers component. | 64d ago |
| CVE-2026-74938 | 9.1 | — | — | — | mozilla / firefox | Mitigation bypass in the JavaScript: GC component. | 64d ago |
| CVE-2026-16406 | 9.1 | — | — | — | mozilla / firefox | Mitigation bypass in the Networking component. | 92d ago |
| CVE-2026-16394 | 9.1 | — | — | — | mozilla / firefox | Mitigation bypass in the DOM: Security component. | 92d ago |
| CVE-2026-16393 | 9.1 | — | — | — | mozilla / firefox | Incorrect boundary conditions in the Graphics: WebGPU component. | 92d ago |
| CVE-2026-16392 | 9.1 | — | — | — | mozilla / firefox | JIT miscompilation in the JavaScript Engine: JIT component. | 92d ago |
| CVE-2026-16390 | 9.1 | — | — | — | mozilla / firefox | Mitigation bypass in the Enterprise Policies component. | 92d ago |
| CVE-2026-16381 | 9.1 | — | — | — | mozilla / firefox | Same-origin policy bypass in the Networking: DNS component. | 92d ago |
| CVE-2026-16380 | 9.1 | — | — | — | mozilla / firefox | Mitigation bypass in the Networking component. | 92d ago |
| CVE-2026-16370 | 9.1 | — | — | — | mozilla / firefox | Mitigation bypass in the DOM: Networking component. | 92d ago |
| CVE-2026-16364 | 9.1 | — | — | — | mozilla / firefox | Incorrect boundary conditions in the Audio/Video: Playback component. | 92d ago |
| CVE-2026-16359 | 9.1 | — | — | — | mozilla / firefox | Incorrect boundary conditions in the Audio/Video: GMP component. | 92d ago |
| CVE-2026-12316 | 9.1 | — | — | — | mozilla / firefox | Mitigation bypass in the DOM: Security component. | 127d ago |
| CVE-2026-12315 | 9.1 | — | — | — | mozilla / firefox | Mitigation bypass in the DOM: Security component. | 127d ago |
| CVE-2026-12304 | 9.1 | — | — | — | mozilla / firefox | Same-origin policy bypass in the Networking: Cookies component. | 127d ago |
| CVE-2026-8948 | 9.1 | — | — | — | mozilla / firefox | Same-origin policy bypass in the DOM: Networking component. | 155d ago |
| CVE-2026-4724 | 9.1 | — | — | — | mozilla / firefox | Undefined behavior in the Audio/Video component. | 211d ago |
| CVE-2026-4716 | 9.1 | — | — | — | mozilla / firefox | Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component. | 211d ago |
| CVE-2026-4715 | 9.1 | — | — | — | mozilla / firefox | Uninitialized memory in the Graphics: Canvas2D component. | 211d ago |
| CVE-2026-84131 | 8.8 | — | — | — | mozilla / firefox | Privilege escalation due to invalid pointer in the Graphics component. | 50d ago |
| CVE-2026-84128 | 8.8 | — | — | — | mozilla / firefox | Privilege escalation in the WebDriver BiDi component. | 50d ago |
| CVE-2026-84123 | 8.8 | — | — | — | mozilla / firefox | Privilege escalation due to use-after-free in the Graphics: WebGPU component. | 50d ago |
| CVE-2026-84117 | 8.8 | — | — | — | mozilla / firefox mobile | Privilege escalation in Firefox for Android. | 50d ago |
| CVE-2026-74969 | 8.8 | — | — | — | mozilla / firefox | Use-after-free in the Layout: Text and Fonts component. | 64d ago |
| CVE-2026-74965 | 8.8 | — | — | — | mozilla / firefox | Privilege escalation in the Shell Integration component. | 64d ago |
| CVE-2026-74955 | 8.8 | — | — | — | mozilla / firefox | Privilege escalation in the Request Handling component. | 64d ago |
| CVE-2026-74953 | 8.8 | — | — | — | mozilla / firefox | Privilege escalation in the Networking: Cookies component. | 64d ago |
| CVE-2026-74952 | 8.8 | — | — | — | mozilla / firefox | Privilege escalation in the Application Update component. | 64d ago |
| CVE-2026-74950 | 8.8 | — | — | — | mozilla / firefox | Privilege escalation in the Downloads API component. | 64d ago |
| CVE-2026-74949 | 8.8 | — | — | — | mozilla / firefox | Privilege escalation due to use-after-free in the Graphics: Canvas2D component. | 64d ago |
| CVE-2026-74947 | 8.8 | — | — | — | mozilla / firefox | Privilege escalation due to invalid pointer in the Graphics component. | 64d ago |
| CVE-2026-74946 | 8.8 | — | — | — | mozilla / firefox | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. | 64d ago |
| CVE-2026-74942 | 8.8 | — | — | — | mozilla / firefox | Privilege escalation in the Remote Settings Client component. | 64d ago |
| CVE-2026-74941 | 8.8 | — | — | — | mozilla / firefox | Privilege escalation in the Graphics: CanvasWebGL component. | 64d ago |
| CVE-2026-74939 | 8.8 | — | — | — | mozilla / firefox | Privilege escalation in the DOM: Navigation component. | 64d ago |