CVE-2026-109720highCWE-843

CVE-2026-109720: high-severity vulnerability in Mozilla Firefox

JIT miscompilation in the JavaScript: WebAssembly component

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21Vexday Risk Score

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

ssvc Trackcvss 7.1epss 0.3%
JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 158, 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:L/A:N
Affected products
Mozilla · FirefoxMozilla · Thunderbird
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