{"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-2026-117861","cwes":["CWE-693"],"description":"Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.","epss":{"date":"2026-11-04","percentile":0.07792,"score":0.00181},"exploits":[],"kev":null,"metrics":[{"score":9.6,"severity":"critical","source":"ADP: CISA-ADP","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793813810718,"publishedAt":1793109902369,"references":[{"source":"CNA: mozilla","tags":[],"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2053240"},{"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/"}],"remediation":[],"revision":"4ab608ebd0563f51e20bd3f5eb64636cb135e222b851ec4f8640260769b7fc13","sources":[{"modifiedAt":1793813810718,"name":"CNA: mozilla","retrievedAt":1793815833006,"url":"https://www.cve.org/CVERecord?id=CVE-2026-117861"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793815854291,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-117861"}],"ssvc":{"assessedAt":1793813805616,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Sandbox escape in the DOM: Navigation component","updatedAt":1793815854291}