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// CVE · PUBLISHED 2026-09-29

CVE-2026-100804

Mozilla / Thunderbird · Mozilla / Firefox

9.6 · CVSS 3.1Critical

Description

Sandbox escape due to use-after-free in the Preferences: Backend component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.

References

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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.