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Mozilla
Thunderbird
See the latest tracked release, confirm when it was published, and subscribe for update emails.
Current version
158.0
- Release date
- October 13, 2026
- Security status
- 100 high-severity CVEs tracked in the last 90 days. Current version impact is unclear.
Source
Public release notes are linked for the latest stored release.
Release history
See the latest published releases stored for this product.
| Version | Published | Notes |
|---|---|---|
| 158.0 | 2026-10-13 | Release Notes |
| 157.0.1 | 2026-10-01 | Release Notes |
| 157.0 | 2026-09-30 | Release Notes |
| 156.0.1 | 2026-09-22 | Release Notes |
| 156.0 | 2026-09-15 | Release Notes |
| 155.0.1 | 2026-09-09 | Release Notes |
| 155.0 | 2026-09-01 | Release Notes |
| 154.0 | 2026-08-18 | Release Notes |
| 153.0.3 | 2026-08-11 | Release Notes |
| 153.0.2 | 2026-08-04 | Release Notes |
| 153.0.1 | 2026-07-28 | Release Notes |
| 153.0 | 2026-07-21 | Release Notes |
| 152.0.1 | 2026-07-01 | Release Notes |
| 152.0 | 2026-06-16 | Release Notes |
| 151.0.1 | 2026-05-26 | Release Notes |
| 151.0 | 2026-05-19 | Release Notes |
Vulnerability tracking
versionPing monitors CVEs for this product. Matching CVEs are listed below. We only display CVEs with a CVSS score of 7.0 or higher that were published within the last 90 days.
Affected status is inferred from published affected version ranges where available. Always verify against the vendor advisory before making production decisions.
| CVE | Severity | Published | Status | Summary |
|---|---|---|---|---|
| CVE-2026-109778 | HIGH (8.8) | 2026-10-13 | Current versionnot affected | Privilege escalation in the WebExtensions component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109766 | HIGH (8.1) | 2026-10-13 | Current versionnot affected | Mitigation bypass in the Enterprise Policies component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109762 | HIGH (8.8) | 2026-10-13 | Current versionnot affected | Incorrect boundary conditions in the SVG component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109760 | HIGH (8.1) | 2026-10-13 | Current versionnot affected | Mitigation bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109759 | HIGH (8.1) | 2026-10-13 | Current versionnot affected | Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109757 | HIGH (8.3) | 2026-10-13 | Current versionnot affected | Sandbox escape due to race condition in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109756 | HIGH (8.8) | 2026-10-13 | Current versionnot affected | Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109755 | CRITICAL (9.6) | 2026-10-13 | Current versionnot affected | Sandbox escape in the DOM: Content Processes component. This vulnerability was fixed in Firefox 158 and Thunderbird 158. |
| CVE-2026-109754 | HIGH (8.1) | 2026-10-13 | Current versionnot affected | Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109750 | CRITICAL (9.6) | 2026-10-13 | Current versionnot affected | Site isolation issue in the DOM: Web Authentication component. This vulnerability was fixed in Firefox 158 and Thunderbird 158. |
| CVE-2026-109747 | HIGH (7.3) | 2026-10-13 | Current versionnot affected | Other issue in the Address Bar component. This vulnerability was fixed in Firefox 158 and Thunderbird 158. |
| CVE-2026-109746 | HIGH (7.3) | 2026-10-13 | Current versionnot affected | Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 158 and Thunderbird 158. |
| CVE-2026-109745 | CRITICAL (9.6) | 2026-10-13 | Current versionnot affected | 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. |
| CVE-2026-109744 | HIGH (8.1) | 2026-10-13 | Current versionnot affected | Other issue in the DOM: File component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109743 | HIGH (8.8) | 2026-10-13 | Current versionnot affected | Privilege escalation in the Panning and Zooming component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109740 | CRITICAL (9.6) | 2026-10-13 | Current versionnot affected | 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. |
| CVE-2026-109739 | HIGH (8.8) | 2026-10-13 | Current versionnot affected | Privilege escalation in the WebExtensions component. This vulnerability was fixed in Firefox 158 and Thunderbird 158. |
| CVE-2026-109737 | HIGH (8.1) | 2026-10-13 | Current versionnot affected | Mitigation bypass in the Enterprise Policies component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109736 | HIGH (8.1) | 2026-10-13 | Current versionnot affected | Frame poisoning in the Layout component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109734 | HIGH (8.1) | 2026-10-13 | Current versionnot affected | Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109720 | HIGH (7.1) | 2026-10-13 | Current versionnot affected | JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109709 | HIGH (8.8) | 2026-10-13 | Current versionnot affected | Information disclosure, privilege escalation in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109708 | CRITICAL (9.6) | 2026-10-13 | Current versionnot affected | Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109707 | CRITICAL (9.6) | 2026-10-13 | Current versionnot affected | Sandbox escape due to use-after-free in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109705 | CRITICAL (9.6) | 2026-10-13 | Current versionnot affected | 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, and Thunderbird 153.5. |
| CVE-2026-109704 | HIGH (8.8) | 2026-10-13 | Current versionnot affected | Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109753 | HIGH (8.1) | 2026-10-13 | Current versionnot affected | Incorrect boundary conditions in the Layout component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109733 | HIGH (8.1) | 2026-10-13 | Current versionnot affected | JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109730 | HIGH (8.8) | 2026-10-13 | Current versionnot affected | Integer overflow in the Graphics component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109722 | HIGH (8.1) | 2026-10-13 | Current versionnot affected | JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109716 | HIGH (8.1) | 2026-10-13 | Current versionnot affected | Incorrect boundary conditions in the JavaScript Engine component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109715 | HIGH (8.1) | 2026-10-13 | Current versionnot affected | Incorrect boundary conditions in the JavaScript Engine component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-109712 | HIGH (7.1) | 2026-10-13 | Current versionnot affected | Sandbox escape due to uninitialized memory in the Graphics component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. |
| CVE-2026-106016 | CRITICAL (9.8) | 2026-10-06 | Current versionnot affected | Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 157.0.1 and Thunderbird 158. |
| CVE-2026-100832 | HIGH (8.8) | 2026-09-29 | Current versionunclear | Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 140.17, Thunderbird 153.4, Firefox ESR 115.42, and Firefox ESR 140.17. |
| CVE-2026-100831 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the DOM: UI Events & Focus Handling component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. |
| CVE-2026-100830 | HIGH (8.1) | 2026-09-29 | Current versionnot affected | Mitigation bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. |
| CVE-2026-100829 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. |
| CVE-2026-100828 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | Mitigation bypass in the Bookmarks & History component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. |
| CVE-2026-100825 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. |
| CVE-2026-100824 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Privilege escalation in the Places component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. |
| CVE-2026-100820 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Privilege escalation in the Address Bar 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. |
| CVE-2026-100819 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | Sandbox escape due to incorrect boundary conditions in the XPCOM 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. |
| CVE-2026-100818 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | Sandbox escape due to use-after-free in the Widget: Gtk 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. |
| CVE-2026-100816 | HIGH (8.1) | 2026-09-29 | Current versionnot affected | Site isolation issue in the DOM: Networking component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. |
| CVE-2026-100815 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. |
| CVE-2026-100814 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. |
| CVE-2026-100813 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Invalid pointer in the JavaScript Engine: JIT component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. |
| CVE-2026-100811 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | Sandbox escape due to use-after-free in the DOM: Core & HTML 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. |
| CVE-2026-100810 | CRITICAL (9.8) | 2026-09-29 | Current versionnot affected | Other issue in the DevTools component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. |
| CVE-2026-100809 | HIGH (8.1) | 2026-09-29 | Current versionnot affected | Same-origin policy bypass in the DevTools component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. |
| CVE-2026-100808 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Mitigation bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. |
| CVE-2026-100807 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Privilege escalation in the DOM: Service Workers 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. |
| CVE-2026-100805 | HIGH (7.5) | 2026-09-29 | Current versionnot affected | Race condition, use-after-free in the Audio/Video component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. |
| CVE-2026-100804 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | Sandbox escape due to use-after-free in the Preferences: Backend component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. |
| CVE-2026-100803 | HIGH (8.1) | 2026-09-29 | Current versionnot affected | Same-origin policy bypass in the WebExtensions 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. |
| CVE-2026-100801 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | 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 157, and Firefox ESR 140.17. |
| CVE-2026-100800 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | 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. |
| CVE-2026-100798 | HIGH (8.1) | 2026-09-29 | Current versionnot affected | Cryptography misuse in Storage: Quota Manager component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. |
| CVE-2026-100797 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Privilege escalation due to use-after-free in the Graphics: WebRender 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. |
| CVE-2026-100796 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. |
| CVE-2026-100794 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | 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. |
| CVE-2026-100792 | HIGH (7.1) | 2026-09-29 | Current versionnot affected | JIT miscompilation 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. |
| CVE-2026-100791 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the DOM: Core & HTML 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. |
| CVE-2026-100790 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the XSLT 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. |
| CVE-2026-100789 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the Graphics: Canvas2D 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. |
| CVE-2026-100788 | CRITICAL (9.8) | 2026-09-29 | Current versionnot affected | 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. |
| CVE-2026-100787 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | Sandbox escape in the XUL component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. |
| CVE-2026-100786 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | Sandbox escape due to use-after-free in the Graphics 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. |
| CVE-2026-100785 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the DOM: Core & HTML 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. |
| CVE-2026-100784 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the Layout: Text and Fonts 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. |
| CVE-2026-100782 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Privilege escalation due to incorrect boundary conditions in the Graphics 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. |
| CVE-2026-100781 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender 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. |
| CVE-2026-100780 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the DOM: Core & HTML 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. |
| CVE-2026-100779 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the XSLT 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. |
| CVE-2026-100778 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | Sandbox escape due to use-after-free in the DOM: Core & HTML 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. |
| CVE-2026-100777 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the Graphics: Canvas2D 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. |
| CVE-2026-100776 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free 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. |
| CVE-2026-100775 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | Sandbox escape in the Graphics 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. |
| CVE-2026-100774 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the DOM: Core & HTML 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. |
| CVE-2026-100773 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the Storage: IndexedDB 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. |
| CVE-2026-100772 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the DOM: Core & HTML 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. |
| CVE-2026-100771 | HIGH (8.1) | 2026-09-29 | Current versionnot affected | Undefined behavior in the DOM: Streams 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. |
| CVE-2026-100770 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | 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. |
| CVE-2026-100769 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free 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. |
| CVE-2026-100768 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. |
| CVE-2026-100767 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the Networking: Cache 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. |
| CVE-2026-100765 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. |
| CVE-2026-100764 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Privilege escalation due to incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. |
| CVE-2026-100763 | CRITICAL (9.1) | 2026-09-29 | Current versionnot affected | Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. |
| CVE-2026-100762 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | 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. |
| CVE-2026-100761 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Privilege escalation due to use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. |
| CVE-2026-100760 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | 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. |
| CVE-2026-100759 | HIGH (8.1) | 2026-09-29 | Current versionnot affected | Uninitialized memory in the Storage: Quota Manager 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. |
| CVE-2026-100758 | CRITICAL (9.6) | 2026-09-29 | Current versionnot affected | 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. |
| CVE-2026-100757 | HIGH (8.8) | 2026-09-29 | Current versionnot affected | Use-after-free in the Widget 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. |
| CVE-2026-100756 | HIGH (8.1) | 2026-09-29 | Current versionnot affected | Incorrect boundary conditions in the Audio/Video: Playback 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. |
| CVE-2026-92240 | CRITICAL (9.1) | 2026-09-15 | Current versionnot affected | A malicious or compromised IMAP server can trigger an out-of-bounds read in the IMAP response parser by sending an untagged '* ID' response, crashing Thunderbird. The affected parsing path is reachable before authentication. This vulnerability was fixed in Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3. |
| CVE-2026-92239 | HIGH (8.1) | 2026-09-15 | Current versionnot affected | A maliciously constructed IMAP line could cause an out-of-bounds buffer read. This vulnerability was fixed in Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3. |
| CVE-2026-92238 | CRITICAL (9.8) | 2026-09-15 | Current versionnot affected | A maliciously constructed mail header could lead to multiple fields being parsed as one, or potential memory safety violations. This vulnerability was fixed in Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3. |
117 further matching CVEs are not displayed. The table shows the 100 most relevant of 217, recently published first.