CVE-2026-8388mediumCWE-119CWE-787

CVE-2026-8388: medium-severity vulnerability in Mozilla Firefox

Incorrect boundary conditions in the JavaScript Engine: JIT component

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33Vexday Risk Score

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

ssvc Attendcvss 6.5epss 0.2%
from disclosure to weapon65 days
Published on NVDMay 12
1st PoC+65d
Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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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