CVE-2026-109722

HighCVSS 8.1/10Last modified Oct 16, 2026

Description

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.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-670

Affected software

No affected versions have been published.

Timeline

Published
Oct 13, 2026
Last modified
Oct 16, 2026
NVD status
Deferred

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CVE-2026-109722: High severity, CVSS 8.1 | Vulnix