{"id":"CVE-2026-109704","title":"Privilege escalation in the Application Update component","summary":"Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-269"],"published":"2026-10-13","updated":"2026-10-14","sourceUpdated":"2026-10-14T16:17:37.183","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109704","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2037979","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-108/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-109/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-110/","label":"security@mozilla.org"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-13T13:27:03.989Z","vendor":"Mozilla","product":"Firefox","affected":["Firefox","Thunderbird"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-14T03:59:07.345013Z"},"epss":0.00409,"epssPercentile":0.34956,"slug":"CVE-2026-109704","body":"## Overview\n\nPrivilege escalation in the Application Update component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.\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":[{"seq":220316,"id":"CVE-2026-109704","ts":1791996106267,"field":"cvss","old":null,"new":"8.8"},{"seq":220315,"id":"CVE-2026-109704","ts":1791996106267,"field":"severity","old":"none","new":"high"}]}