CVEvulnerability
CVE-2026-100820
8.8 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-09-29
- Last modified
- 2026-10-05
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-269
Description
Privilege escalation in the Address Bar component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.
Affected configurations
• mozilla firefox (< 140.17.0)
• mozilla firefox (>= 141.0 < 153.4.0)
• mozilla firefox (>= 154.0.0 < 157.0.0)
• mozilla thunderbird (< 140.17.0)
• mozilla thunderbird (>= 141.0 < 153.4.0)
• mozilla thunderbird (>= 154.0 < 157.0)
Related
Weakness · CWE (1)
- CWE-269 Improper Privilege Management weakness
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2071645 Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-100/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-101/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-102/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-103/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-97/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-99/ Vendor Advisory