9.6
Critical
CVE-2026-100760 Sandbox escape in the Security: Process Sandboxing component
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 157 | earliest → < 157 | 157 |
| Firefox 153.4 | earliest → < 153.4 | 153.4 |
| Thunderbird 157 | earliest → < 157 | 157 |
| Thunderbird 153.4 | earliest → < 153.4 | 153.4 |
Other CVEs of Firefox
The 2221 CVEs of Firefox →
CVE-2026-120572
Incorrect boundary conditions in the Layout: Block and Inline component
8.8
High
CVE-2026-118027
Frame poisoning in the Layout component
9.1
Critical
CVE-2026-118026
Invalid pointer in the JavaScript: GC component
8.8
High
CVE-2026-118024
Use-after-free in the Graphics: Text component
8.8
High