VULNERABILITY INTELLIGENCE

CVE-2026-6771

CVSS score9.8 CRITICAL
EPSS probability0.31%
CISA KEVNot currently listed
Published2026-04-21
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Weakness classification

  • CWE-288: Authentication Bypass Using an Alternate Path or Channel

Primary references