CVEvulnerability
CVE-2026-6771
9.8 CRITICAL
Official page ↗
- Status
- Analyzed
- Published
- 2026-04-21
- Last modified
- 2026-10-26
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-288
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.
Affected configurations
• mozilla firefox (< 150.0)
• mozilla firefox (>= 140.0 < 140.10.0)
• mozilla thunderbird (>= 140.0 < 140.10.0)
Related
Weakness · CWE (1)
- CWE-288 Authentication Bypass Using an Alternate Path or Channel weakness
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2025067 Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-30/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-32/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-33/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-34/ Vendor Advisory