CVE-2026-117890highCWE-843

CVE-2026-117890: high-severity vulnerability in Mozilla Firefox

JIT miscompilation in the JavaScript Engine: JIT component

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21Vexday Risk Score

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

ssvc Trackcvss 7.3epss 0.2%
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Affected products
Mozilla · FirefoxMozilla · Thunderbird
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