Vulnerabilities
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CVSS
EPSS
| CVE | CVSS | EPSS | Vendor, product | Description | Modified |
|---|---|---|---|---|---|
| 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 |
| CVE-2026-16381 | 9.1 critical | 0.00% | mozilla, firefox, thunderbird | Same-origin policy bypass in the Networking: DNS component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. | Sat 24 Oct |
| CVE-2026-16390 | 9.1 critical | 0.00% | mozilla, firefox, thunderbird | Mitigation bypass in the Enterprise Policies component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. | Sat 24 Oct |
| CVE-2026-16394 | 9.1 critical | 0.00% | mozilla, firefox | Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 153 and Thunderbird 153. | Sat 24 Oct |
| CVE-2026-16406 | 9.1 critical | 0.00% | mozilla, firefox | Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153. | Sat 24 Oct |
| CVE-2026-8948 | 9.1 critical | 0.00% | mozilla, firefox, thunderbird | Same-origin policy bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 151 and Thunderbird 151. | 14 Oct |
| CVE-2026-100763 | 9.1 critical | 0.00% | mozilla, firefox, thunderbird | Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. | 13 Oct |
| CVE-2025-11717 | 9.1 critical | 0.00% | mozilla, firefox | When switching between Android apps using the card carousel Firefox shows a black screen as its card image when a password-related screen was the last one being used. Prior to Firefox 144 the password edit screen was visible. This vulnerability was fixed in Firefox 144. | 8 Oct |
| CVE-2026-74969 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Race condition, use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1. | Wed 28 Oct |
| CVE-2026-74949 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1. | Wed 28 Oct |
| CVE-2026-74946 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Information disclosure due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1. | Wed 28 Oct |
| CVE-2026-118008 | 8.8 high | 0.00% | no CPE yet | Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 159 and Thunderbird 159. | Wed 28 Oct |
| CVE-2026-100801 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Privilege escalation in the DLL Services component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 159, Firefox ESR 153.6, Thunderbird 159, Thunderbird 153.6, Firefox 157, and Firefox ESR 140.17. | Tue 27 Oct |
| CVE-2026-6761 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. | Mon 26 Oct |
| CVE-2026-6769 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. | Mon 26 Oct |
| CVE-2026-5733 | 8.8 high | 0.00% | mozilla, firefox | Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 149.0.2 and Thunderbird 149.0.2. | Mon 26 Oct |
| CVE-2026-6750 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. | Mon 26 Oct |
| CVE-2026-12289 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Privilege escalation in the Graphics: WebRender 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-2026-12291 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Use-after-free in the Networking: HTTP 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-2026-16371 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, Thunderbird 140.13, Firefox ESR 140.15, and Thunderbird 140.15. | Sat 24 Oct |
| CVE-2026-16362 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Use-after-free in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. | Sat 24 Oct |
| CVE-2026-16365 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 153, Thunderbird 153, Firefox ESR 140.15, and Thunderbird 140.15. | Sat 24 Oct |
| CVE-2026-16366 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153 and Thunderbird 153. | Sat 24 Oct |
| CVE-2026-16372 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Privilege escalation in the DOM: Content Processes component. This vulnerability was fixed in Firefox 153 and Thunderbird 153. | Sat 24 Oct |
| CVE-2026-16379 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Privilege escalation in the DOM: Content Processes component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. | Sat 24 Oct |
| CVE-2026-16396 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Privilege escalation in WebExtensions. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. | Sat 24 Oct |
| CVE-2026-16401 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Privilege escalation in the Data Loss Prevention component. This vulnerability was fixed in Firefox 153 and Thunderbird 153. | Sat 24 Oct |
| CVE-2026-5732 | 8.8 high | 0.00% | mozilla, firefox | Incorrect boundary conditions, integer overflow in the Graphics: Text component. This vulnerability was fixed in Firefox 149.0.2, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1. | Sat 24 Oct |
| CVE-2025-11715 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Memory safety bugs present in Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143. 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 144, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4. | Fri 23 Oct |
| CVE-2025-10537 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Memory safety bugs present in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142. 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 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3. | Fri 23 Oct |
| CVE-2025-11714 | 8.8 high | 0.00% | mozilla, firefox, thunderbird | Memory safety bugs present in Firefox ESR 115.28, Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143. 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 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4. | Fri 23 Oct |
| CVE-2025-13014 | 8.8 high | 0.00% | mozilla, firefox | Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Firefox ESR 115.30, Thunderbird 145, and Thunderbird 140.5. | Fri 23 Oct |
| CVE-2025-13020 | 8.8 high | 0.00% | mozilla, firefox | Use-after-free in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Thunderbird 145, and Thunderbird 140.5. | Fri 23 Oct |
| CVE-2025-6426 | 8.8 high | 0.00% | mozilla, firefox | The executable file warning did not warn users before opening files with the `terminal` extension. *This bug only affects Firefox for macOS. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox 140, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12. | Fri 23 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.