{"id":"CVE-2026-16371","title":"Privilege escalation in the DOM: Navigation component","summary":"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.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvssSource":"adp","vendor":"Mozilla","product":"Firefox","affected":["Firefox","Thunderbird"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-07-24T03:55:30.041879Z"},"published":"2026-07-21","updated":"2026-10-21","sourceUpdated":"2026-10-21T13:49:31.123Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-16371","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2008369"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-70/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-71/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-72/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-84/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-87/"}],"tags":["cve.org"],"epss":0.00297,"epssPercentile":0.21033,"ingestedAt":"2026-10-21T13:57:01.110Z","slug":"CVE-2026-16371","body":"## Overview\n\nPrivilege 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.\n\n## Affected\n\n- `Firefox`\n- `Thunderbird`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}