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CVE-2026-100793

JIT miscompilation in the JavaScript Engine component

3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 0.1%
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
JIT miscompilation in the JavaScript Engine component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
Affected products
Mozilla · FirefoxMozilla · Thunderbird
References
https://bugzilla.mozilla.org/show_bug.cgi?id=2073268https://www.mozilla.org/security/advisories/mfsa2026-101/https://www.mozilla.org/security/advisories/mfsa2026-97/