{"affected":[{"product":"Firefox","source":"CNA: mozilla","vendor":"Mozilla","versions":[{"lessThanOrEqual":"115.*","status":"unaffected","version":"115.44","versionType":"rpm"},{"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-2026-117915","cwes":["CWE-119"],"description":"Incorrect boundary conditions in the Layout: Block and Inline component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.","epss":{"date":"2026-11-04","percentile":0.08361,"score":0.00187},"exploits":[],"kev":null,"metrics":[{"score":7.3,"severity":"high","source":"ADP: CISA-ADP","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"}],"modifiedAt":1793818043169,"publishedAt":1793109923893,"references":[{"source":"CNA: mozilla","tags":[],"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2079255"},{"source":"CNA: mozilla","tags":[],"url":"https://www.mozilla.org/security/advisories/mfsa2026-118/"},{"source":"CNA: mozilla","tags":[],"url":"https://www.mozilla.org/security/advisories/mfsa2026-119/"},{"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":"3facc637864e93512ec73cb8c958d4d7dccffd612acbd85b761580c24a642764","sources":[{"modifiedAt":1793818043169,"name":"CNA: mozilla","retrievedAt":1793819347087,"url":"https://www.cve.org/CVERecord?id=CVE-2026-117915"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793819369580,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-117915"}],"ssvc":{"assessedAt":1793818039020,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Incorrect boundary conditions in the Layout: Block and Inline component","updatedAt":1793819369580}