critical9.6
CVE-2026-100804
Sandbox escape due to use-after-free in the Preferences: Backend component.
Impact
Sandbox escape due to use-after-free in the Preferences: Backend component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mozilla | Firefox | before 157.0.0 |
| Mozilla | Thunderbird | before 157.0 |