CVE-2026-109722highCWE-670

CVE-2026-109722: high-severity vulnerability in Mozilla Firefox

JIT miscompilation in the JavaScript Engine: JIT component

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41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 8.1epss 0.3%
from disclosure to weapon16 days
Published on NVDOct 13
1st PoC+16d
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Affected products
Mozilla · FirefoxMozilla · Thunderbird
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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