Mozilla Thunderbird ESR (sl) 153.0.1
Mozilla Thunderbird ESR (sl) 153.0.1, released July 23, 2026, fixes 272 CVEs in Mozilla Thunderbird ESR (sl). None of them is reported as exploited. Patch Radar priority: Urgent. The latest Mozilla Thunderbird ESR (sl) is 153.7.0, which also fixes every one of these CVEs.
Superseded. The latest Mozilla Thunderbird ESR (sl) is 153.7.0, which also fixes every CVE on this page. Install that instead.
Priority of the 272 CVEs
Applies to
| Product | Version |
|---|---|
| Mozilla Thunderbird ESR (sl) | 153.0.1 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| Urgent | CVE-2026-2796 | JIT miscompilation in the JavaScript: WebAssembly component | 9.8 | 0.0095 | None reported |
| Urgent | CVE-2026-16357 | Incorrect boundary conditions in the Graphics component | 9.8 | 0.0087 | None reported |
| Urgent | CVE-2026-2805 | Invalid pointer in the DOM: Core & HTML component | 9.8 | 0.0066 | None reported |
| Urgent | CVE-2026-16402 | Integer overflow in the Graphics: ImageLib component | 9.8 | 0.0062 | None reported |
| Urgent | CVE-2025-8028 | Large branch table could lead to truncated instruction | 9.8 | 0.0058 | None reported |
| Urgent | CVE-2026-16389 | Incorrect boundary conditions, integer overflow in the Libraries component in NSS | 9.8 | 0.0057 | None reported |
| Urgent | CVE-2026-16382 | Mitigation bypass in the DOM: Service Workers component | 9.8 | 0.0056 | None reported |
| Urgent | CVE-2026-16388 | Sandbox escape in the DOM: Networking component | 9.8 | 0.0055 | None reported |
| Urgent | CVE-2026-16410 | JIT miscompilation in the JavaScript Engine: JIT component | 9.8 | 0.0055 | None reported |
| Urgent | CVE-2026-2799 | Use-after-free in the DOM: Core & HTML component | 9.8 | 0.0054 | None reported |
| Urgent | CVE-2026-16393 | Incorrect boundary conditions in the Graphics: WebGPU component | 9.1 | 0.0054 | None reported |
| Urgent | CVE-2026-16392 | JIT miscompilation in the JavaScript Engine: JIT component | 9.1 | 0.0053 | None reported |
| Urgent | CVE-2026-2797 | Use-after-free in the JavaScript: GC component | 9.8 | 0.0053 | None reported |
| Urgent | CVE-2025-9187 | Memory safety bugs fixed in Firefox 142 and Thunderbird 142 | 9.8 | 0.0052 | None reported |
| Urgent | CVE-2026-4724 | Undefined behavior in the Audio/Video component | 9.1 | 0.0052 | None reported |
| Urgent | CVE-2026-16353 | Invalid pointer in the DOM: Bindings (WebIDL) component | 9.8 | 0.0052 | None reported |
| Urgent | CVE-2026-16407 | Mitigation bypass in the DOM: Service Workers component | 9.8 | 0.0051 | None reported |
| Urgent | CVE-2025-8031 | Incorrect URL stripping in CSP reports | 9.8 | 0.0051 | None reported |
| Urgent | CVE-2025-14326 | Use-after-free in the Audio/Video: GMP component | 9.8 | 0.0050 | None reported |
| Urgent | CVE-2025-8044 | Memory safety bugs fixed in Firefox 141 and Thunderbird 141 | 9.8 | 0.0048 | None reported |
| Urgent | CVE-2026-16360 | Memory safety bugs fixed in Thunderbird ESR 140.13 and Thunderbird 153 | 9.8 | 0.0047 | None reported |
| Urgent | CVE-2025-8034 | Memory safety bugs fixed in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141 | 8.8 | 0.0046 | None reported |
| Urgent | CVE-2026-2806 | Uninitialized memory in the Graphics: Text component | 9.1 | 0.0045 | None reported |
| Urgent | CVE-2026-0892 | Memory safety bugs fixed in Firefox 147 and Thunderbird 147 | 9.8 | 0.0045 | None reported |
| Urgent | CVE-2025-8043 | Incorrect URL truncation | 9.8 | 0.0044 | None reported |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.