CVE-2026-100793

JIT miscompilation in the JavaScript Engine component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.

Published Sep 29, 2026
CVSS 6.5 medium
0.3% chance of exploitation in the next 30 days (EPSS)
A fix is available

Affected software

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CVE-2026-100793 at the National Vulnerability Database