Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, Thunderbird 140.13, Firefox ESR 140.15, and Thunderbird 140.15.
Fix
Patch, vendor advisory and mitigation references on NVD 4
- https://www.mozilla.org/security/advisories/mfsa2026-68/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-70/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-71/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-72/ Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 5
- CwesCWE-269NVD modified 2026-10-24 20:10
- Cpes+3 CPE criteria (now 3)NVD modified 2026-10-24 20:10
- StatusPublished → ModifiedNVD modified 2026-10-24 20:10
- CVSS8.8 (v3.1, CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)NVD modified 2026-10-24 20:10
- First seenunscored · mozillaNVD modified 2026-10-21 13:49
Affected (CPE criteria) 3
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
References 7
- https://bugzilla.mozilla.org/show_bug.cgi?id=2008369 Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-68/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-70/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-71/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-72/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-84/
- https://www.mozilla.org/security/advisories/mfsa2026-87/