{"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-2026-117928","cwes":["CWE-346"],"description":"Same-origin policy bypass in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.","epss":{"date":"2026-11-04","percentile":0.0882,"score":0.0019},"exploits":[],"kev":null,"metrics":[{"score":8.1,"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:N","version":"3.1"}],"modifiedAt":1793825344735,"publishedAt":1793109928726,"references":[{"source":"CNA: mozilla","tags":[],"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2081280"},{"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":"70f6048694515ae24a90a440a9a6057239d3a7d18084ee53b8839a71842f9f33","sources":[{"modifiedAt":1793825344735,"name":"CNA: mozilla","retrievedAt":1793826637775,"url":"https://www.cve.org/CVERecord?id=CVE-2026-117928"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793826646770,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-117928"}],"ssvc":{"assessedAt":1793825300017,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Same-origin policy bypass in the CSS Parsing and Computation component","updatedAt":1793826646770}