CVE-2026-109720

HighCVSS 7.1/10Last modified Oct 19, 2026

Description

JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

Metrics

CVSS 3.1 7.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

Weakness enumeration

CWE-843

Affected software

No affected versions have been published.

Timeline

Published
Oct 13, 2026
Last modified
Oct 19, 2026
NVD status
Deferred

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CVE-2026-109720: High severity, CVSS 7.1 | Vulnix