Mozilla Thunderbird (rm) 153.0
Mozilla Thunderbird (rm) 153.0, released July 21, 2026, fixes 53 CVEs in Mozilla Thunderbird (rm). None of them is reported as exploited. Patch Radar priority: Urgent. The latest Mozilla Thunderbird (rm) is 159.0, which also fixes every one of these CVEs.
Superseded. The latest Mozilla Thunderbird (rm) is 159.0, which also fixes every CVE on this page. Install that instead.
Priority of the 53 CVEs
Applies to
| Product | Version |
|---|---|
| Mozilla Thunderbird (rm) | 153.0 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| Urgent | CVE-2026-16357 | Incorrect boundary conditions in the Graphics component | 9.8 | 0.0087 | None reported |
| Urgent | CVE-2026-16402 | Integer overflow in the Graphics: ImageLib component | 9.8 | 0.0062 | 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-2026-16393 | 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-2026-16353 | 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-2026-16360 | Memory safety bugs fixed in Thunderbird ESR 140.13 and Thunderbird 153 | 9.8 | 0.0047 | None reported |
| Urgent | CVE-2026-16363 | JIT miscompilation in the JavaScript: WebAssembly component | 9.8 | 0.0044 | None reported |
| Urgent | CVE-2026-16369 | Integer overflow in the JavaScript: WebAssembly component | 9.8 | 0.0044 | None reported |
| Urgent | CVE-2026-16370 | Mitigation bypass in the DOM: Networking component | 9.1 | 0.0043 | None reported |
| Urgent | CVE-2026-16364 | Incorrect boundary conditions in the Audio/Video: Playback component | 9.1 | 0.0043 | None reported |
| Urgent | CVE-2026-16350 | Incorrect boundary conditions in the Audio/Video: cubeb component | 9.8 | 0.0041 | None reported |
| Urgent | CVE-2026-16355 | JIT miscompilation in the JavaScript Engine: JIT component | 9.8 | 0.0041 | None reported |
| Urgent | CVE-2026-16351 | Sandbox escape due to use-after-free in the DOM: Navigation component | 9.8 | 0.0039 | None reported |
| Urgent | CVE-2026-16352 | Sandbox escape due to use-after-free in the Disability Access APIs component | 9.8 | 0.0039 | None reported |
| Urgent | CVE-2026-16356 | Sandbox escape due to use-after-free in the Disability Access APIs component | 9.8 | 0.0039 | None reported |
| Urgent | CVE-2026-16368 | Incorrect boundary conditions in the JavaScript: WebAssembly component | 9.8 | 0.0039 | None reported |
| Urgent | CVE-2026-16377 | Mitigation bypass in the PDF Viewer component | 9.8 | 0.0039 | None reported |
| Urgent | CVE-2026-16383 | Mitigation bypass in the DOM: Networking component | 9.8 | 0.0039 | None reported |
| Urgent | CVE-2026-16367 | Sandbox escape due to invalid pointer in the Disability Access APIs component | 10.0 | 0.0038 | None reported |
| Urgent | CVE-2026-16390 | Mitigation bypass in the Enterprise Policies component | 9.1 | 0.0032 | None reported |
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