CVE-2026-117942

HighCVSS 7.3/10Last modified Nov 5, 2026

Description

Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

Metrics

CVSS 3.1 7.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Weakness enumeration

CWE-119

Affected software

VendorProductVersions
MozillaFirefox—
MozillaThunderbird—

References

Timeline

Published
Oct 27, 2026
Last modified
Nov 5, 2026
NVD status
Deferred

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CVE-2026-117942: High severity, CVSS 7.3 | Vulnix