{"affected":[{"product":"Firefox","source":"CNA: mozilla","vendor":"Mozilla","versions":[{"lessThanOrEqual":"153.*","status":"unaffected","version":"153.6","versionType":"rpm"},{"lessThanOrEqual":"*","status":"unaffected","version":"159","versionType":"rpm"}]},{"product":"Thunderbird","source":"CNA: mozilla","vendor":"Mozilla","versions":[{"lessThanOrEqual":"153.*","status":"unaffected","version":"153.6","versionType":"rpm"},{"lessThanOrEqual":"*","status":"unaffected","version":"159","versionType":"rpm"}]}],"cveId":"CVE-2026-117967","cwes":["CWE-693"],"description":"Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.","epss":{"date":"2026-11-05","percentile":0.08796,"score":0.0019},"exploits":[],"kev":null,"metrics":[{"score":8.8,"severity":"high","source":"ADP: CISA-ADP","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},{"score":8.8,"severity":"high","source":"NVD: 134c704f-9b21-4f2e-91b3-4a467353bcc0","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793895457883,"publishedAt":1793109942858,"references":[{"source":"CNA: mozilla","tags":[],"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2075930"},{"source":"CNA: mozilla","tags":[],"url":"https://www.mozilla.org/security/advisories/mfsa2026-118/"},{"source":"CNA: mozilla","tags":[],"url":"https://www.mozilla.org/security/advisories/mfsa2026-120/"},{"source":"CNA: mozilla","tags":[],"url":"https://www.mozilla.org/security/advisories/mfsa2026-121/"},{"source":"CNA: mozilla","tags":[],"url":"https://www.mozilla.org/security/advisories/mfsa2026-122/"},{"source":"security@mozilla.org","tags":[],"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2075930"},{"source":"security@mozilla.org","tags":[],"url":"https://www.mozilla.org/security/advisories/mfsa2026-118/"},{"source":"security@mozilla.org","tags":[],"url":"https://www.mozilla.org/security/advisories/mfsa2026-120/"},{"source":"security@mozilla.org","tags":[],"url":"https://www.mozilla.org/security/advisories/mfsa2026-121/"},{"source":"security@mozilla.org","tags":[],"url":"https://www.mozilla.org/security/advisories/mfsa2026-122/"}],"remediation":[],"revision":"69a8abd1ad2ff0cf681ac0cdbf383dd3fbfa5217146d566f4c97259c542ec870","sources":[{"modifiedAt":1793893646932,"name":"CNA: mozilla","retrievedAt":1793895310464,"url":"https://www.cve.org/CVERecord?id=CVE-2026-117967"},{"modifiedAt":1793895457883,"name":"NVD","retrievedAt":1793902917475,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-117967"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793895343403,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-117967"}],"ssvc":{"assessedAt":1793893607682,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Mitigation bypass in the DOM: Security component","updatedAt":1793902917475}