Mozilla Firefox (en-US) 153.0
Mozilla Firefox (en-US) 153.0, released July 21, 2026, fixes 61 CVEs in Mozilla Firefox (en-US). None of them is reported as exploited. Patch Radar priority: Urgent. The latest Mozilla Firefox (en-US) is 159.0, which also fixes every one of these CVEs.
Superseded. The latest Mozilla Firefox (en-US) is 159.0, which also fixes every CVE on this page. Install that instead.
Priority of the 61 CVEs
Applies to
| Product | Version |
|---|---|
| Mozilla Firefox (en-US) | 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-2026-16412 | Memory safety bugs fixed in Thunderbird ESR 140.13 and Thunderbird 153 | 9.8 | 0.0064 | None reported |
| Urgent | CVE-2026-16395 | Integer overflow in the Audio/Video component | 9.8 | 0.0062 | None reported |
| Urgent | CVE-2026-16402 | Integer overflow in the Graphics: ImageLib component | 9.8 | 0.0062 | None reported |
| Urgent | CVE-2026-16408 | Integer overflow in the Audio/Video: Playback 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-2026-16411 | Memory safety bugs fixed in Thunderbird 153 | 9.8 | 0.0049 | 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-2026-16394 | Mitigation bypass in the DOM: Security component | 9.1 | 0.0043 | None reported |
| Urgent | CVE-2026-16406 | Mitigation bypass in the 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 |
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