CVE-2026-100804
Sandbox escape due to use-after-free in the Preferences: Backend component
CVSS Score
9.6
EPSS Score
0.0%
EPSS Percentile
0th
Sandbox escape due to use-after-free in the Preferences: Backend component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
| Vendor | mozilla |
| Product | thunderbird |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 29, 2026 |
| Last Updated | Sep 30, 2026 |
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Affected Versions
Mozilla / Thunderbird
All versions affected Mozilla / Firefox
All versions affected References
Credits
Mozilla