Vulnerabilities
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CVSS
EPSS
| CVE | CVSS | EPSS | Vendor, product | Description | Modified |
|---|---|---|---|---|---|
| CVE-2026-6760 | 9.8 critical | 0.00% | mozilla, firefox, thunderbird | Mitigation bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 150 and Thunderbird 150. | Mon 26 Oct |
| CVE-2026-6768 | 9.8 critical | 0.00% | mozilla, firefox, thunderbird | Mitigation bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 150 and Thunderbird 150. | Mon 26 Oct |
| CVE-2026-8091 | 9.8 critical | 0.00% | mozilla, firefox, thunderbird | Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, Thunderbird 140.10.1, and Firefox ESR 115.35.2. | Mon 26 Oct |
| CVE-2026-16349 | 9.8 critical | 0.00% | mozilla, firefox, thunderbird | Same-origin policy bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. | Sat 24 Oct |
| CVE-2026-16358 | 9.8 critical | 0.00% | mozilla, firefox, thunderbird | Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. | Sat 24 Oct |
| CVE-2026-16375 | 9.8 critical | 0.00% | mozilla, firefox, thunderbird | Site isolation issue in the Networking: HTTP component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. | Sat 24 Oct |
| CVE-2026-16387 | 9.8 critical | 0.00% | mozilla, firefox, thunderbird | Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. | Sat 24 Oct |
| CVE-2026-5731 | 9.8 critical | 0.00% | mozilla, firefox, thunderbird | 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 was fixed in Firefox 149.0.2, Firefox ESR 115.34.1, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1. | Sat 24 Oct |
| CVE-2026-5734 | 9.8 critical | 0.00% | mozilla, firefox, thunderbird | 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 was fixed in Firefox 149.0.2, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1. | Fri 23 Oct |
| CVE-2026-5735 | 9.8 critical | 0.00% | mozilla, firefox, thunderbird | Memory safety bugs present in 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 was fixed in Firefox 149.0.2 and Thunderbird 149.0.2. | Fri 23 Oct |
| CVE-2025-11709 | 9.8 critical | 0.00% | mozilla, firefox, thunderbird | A compromised web process was able to trigger out of bounds reads and writes in a more privileged process using manipulated WebGL textures. This vulnerability was fixed in Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4. | Fri 23 Oct |
| CVE-2025-11710 | 9.8 critical | 0.00% | mozilla, firefox, thunderbird | A compromised web process using malicious IPC messages could have caused the privileged browser process to reveal blocks of its memory to the compromised process. This vulnerability was fixed in Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4. | Fri 23 Oct |
| CVE-2026-100788 | 9.8 critical | 0.00% | mozilla, firefox, thunderbird | Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17. | 19 Oct |
| CVE-2025-11719 | 9.8 critical | 0.00% | mozilla, firefox, thunderbird | Starting in Thunderbird 143, the use of the native messaging API by web extensions on Windows could lead to crashes caused by use-after-free memory corruption. This vulnerability was fixed in Firefox 144 and Thunderbird 144. | 18 Oct |
| CVE-2025-11721 | 9.8 critical | 0.00% | mozilla, firefox, thunderbird | Memory safety bug present in Firefox 143 and Thunderbird 143. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 144 and Thunderbird 144. | 18 Oct |
| CVE-2025-13021 | 9.8 critical | 0.00% | mozilla, firefox | Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 145 and Thunderbird 145. | 18 Oct |
| CVE-2025-13022 | 9.8 critical | 0.00% | mozilla, firefox | Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 145 and Thunderbird 145. | 18 Oct |
| CVE-2025-13023 | 9.8 critical | 0.00% | mozilla, firefox | Sandbox escape due to incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 145 and Thunderbird 145. | 18 Oct |
| CVE-2025-13024 | 9.8 critical | 0.00% | mozilla, firefox | JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 145 and Thunderbird 145. | 18 Oct |
| CVE-2025-13026 | 9.8 critical | 0.00% | mozilla, firefox | Sandbox escape due to incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 145 and Thunderbird 145. | 18 Oct |
| CVE-2026-106016 | 9.8 critical | 0.00% | mozilla, firefox | Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 157.0.1 and Thunderbird 158. | 13 Oct |
| CVE-2026-109708 | 9.6 critical | 0.00% | no CPE yet | Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, Thunderbird 153.5, and Firefox ESR 115.44. | Tue 27 Oct |
| CVE-2026-109707 | 9.6 critical | 0.00% | no CPE yet | Sandbox escape due to use-after-free in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, Thunderbird 153.5, and Firefox ESR 115.44. | Tue 27 Oct |
| CVE-2026-109705 | 9.6 critical | 0.00% | no CPE yet | Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, Thunderbird 153.5, and Firefox ESR 115.44. | Tue 27 Oct |
| CVE-2026-7321 | 9.6 critical | 0.00% | mozilla, firefox, thunderbird | Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, and Thunderbird 140.10.1. | Mon 26 Oct |
| CVE-2026-12294 | 9.6 critical | 0.00% | mozilla, firefox, thunderbird | Sandbox escape in the DOM: Workers component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12. | Mon 26 Oct |
| CVE-2026-12296 | 9.6 critical | 0.00% | mozilla, firefox, thunderbird | Sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12. | Mon 26 Oct |
| CVE-2026-12297 | 9.6 critical | 0.00% | mozilla, firefox, thunderbird | Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12. | Mon 26 Oct |
| CVE-2026-109750 | 9.6 critical | 0.00% | no CPE yet | Site isolation issue in the DOM: Web Authentication component. This vulnerability was fixed in Firefox 158 and Thunderbird 158. | 19 Oct |
| CVE-2026-100800 | 9.6 critical | 0.00% | mozilla, firefox, thunderbird | Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | 19 Oct |
| CVE-2026-100804 | 9.6 critical | 0.00% | mozilla, firefox, thunderbird | Sandbox escape due to use-after-free in the Preferences: Backend component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. | 19 Oct |
| CVE-2026-100794 | 9.6 critical | 0.00% | mozilla, firefox, thunderbird | Sandbox escape due to incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17. | 19 Oct |
| CVE-2026-109745 | 9.6 critical | 0.00% | no CPE yet | Sandbox escape due to uninitialized memory in the DOM: Web Serial component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. | 19 Oct |
| CVE-2026-109740 | 9.6 critical | 0.00% | no CPE yet | Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. | 19 Oct |
| CVE-2026-109755 | 9.6 critical | 0.00% | no CPE yet | Sandbox escape in the DOM: Content Processes component. This vulnerability was fixed in Firefox 158 and Thunderbird 158. | 15 Oct |
| CVE-2026-8959 | 9.6 critical | 0.00% | mozilla, firefox, thunderbird | Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. | 14 Oct |
| CVE-2026-100758 | 9.6 critical | 0.00% | mozilla, firefox, thunderbird | Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | 13 Oct |
| CVE-2026-100760 | 9.6 critical | 0.00% | mozilla, firefox, thunderbird | Sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | 13 Oct |
| CVE-2026-100762 | 9.6 critical | 0.00% | mozilla, firefox, thunderbird | Sandbox escape due to use-after-free in the DOM: Content Processes component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | 13 Oct |
| CVE-2026-100828 | 9.6 critical | 0.00% | mozilla, firefox, thunderbird | Mitigation bypass in the Bookmarks & History component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | 13 Oct |
| CVE-2026-100829 | 9.6 critical | 0.00% | mozilla, firefox, thunderbird | Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | 13 Oct |
| CVE-2026-8950 | 9.3 critical | 0.00% | mozilla, firefox, thunderbird | Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. | 14 Oct |
| CVE-2026-109772 | 9.1 critical | 0.00% | no CPE yet | Same-origin policy bypass in the DevTools component. This vulnerability was fixed in Firefox 158 and Thunderbird 158. | Mon 26 Oct |
| CVE-2026-12304 | 9.1 critical | 0.00% | mozilla, firefox, thunderbird | Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12. | Mon 26 Oct |
| CVE-2026-12315 | 9.1 critical | 0.00% | mozilla, firefox, thunderbird | Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12. | Mon 26 Oct |
| CVE-2026-12316 | 9.1 critical | 0.00% | mozilla, firefox, thunderbird | Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152 and Thunderbird 152. | Mon 26 Oct |
| CVE-2026-16364 | 9.1 critical | 0.00% | mozilla, firefox, thunderbird | Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 153 and Thunderbird 153. | Sat 24 Oct |
| CVE-2026-16359 | 9.1 critical | 0.00% | mozilla, firefox, thunderbird | Incorrect boundary conditions in the Audio/Video: GMP component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. | Sat 24 Oct |
| CVE-2026-16370 | 9.1 critical | 0.00% | mozilla, firefox, thunderbird | Mitigation bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153. | Sat 24 Oct |
| CVE-2026-16380 | 9.1 critical | 0.00% | mozilla, firefox, thunderbird | Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153. | Sat 24 Oct |
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EPSS scores: 2026-10-28. NVD cursor: 2026-10-29 00:22. The News page shows only notable CVEs (KEV, your stack, new criticals, EPSS over 50%, or active exploitation per SSVC); this table has all of them.