Mozilla Firefox ESR (th) 153.0.0
Mozilla Firefox ESR (th) 153.0.0, released July 20, 2026, fixes 389 CVEs in Mozilla Firefox ESR (th). None of them is reported as exploited. Patch Radar priority: Urgent. The latest Mozilla Firefox ESR (th) is 153.7.0, which also fixes every one of these CVEs.
Superseded. The latest Mozilla Firefox ESR (th) is 153.7.0, which also fixes every CVE on this page. Install that instead.
Priority of the 389 CVEs
Applies to
| Product | Version |
|---|---|
| Mozilla Firefox ESR (th) | 153.0.0 |
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-2026-16412 | Memory safety bugs fixed in Thunderbird ESR 140.13 and Thunderbird 153 | 9.8 | 0.0064 | None reported |
| Urgent | CVE-2026-4723 | Use-after-free in the JavaScript Engine component | 9.8 | 0.0063 | 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-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-2026-16411 | Memory safety bugs fixed in Thunderbird 153 | 9.8 | 0.0049 | None reported |
| Urgent | CVE-2025-8044 | Memory safety bugs fixed in Firefox 141 and Thunderbird 141 | 9.8 | 0.0048 | None reported |
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