VULNERABILITY INTELLIGENCE

CVE-2026-16355

CVSS score9.8 CRITICAL
EPSS probability0.60%
CISA KEVNot currently listed
Published2026-07-21
Last modified2026-10-24
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

Weakness classification

  • CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')

Primary references