{"id":"CVE-2026-100815","title":"Use-after-free in the CSS Parsing and Computation component","summary":"Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.","severity":"high","vendor":"Mozilla","product":"Firefox","affected":["Firefox"],"published":"2026-09-29","updated":"2026-09-29","sourceUpdated":"2026-09-29T13:17:46.650","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-100815","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2068404","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-100/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-97/","label":"security@mozilla.org"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-29T13:34:31.674Z","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-29T14:21:37.103572Z"},"cvssSource":"adp","slug":"CVE-2026-100815","body":"## Overview\n\nUse-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.\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,"exploitation":0,"ransomware":0},"changes":[{"seq":212707,"id":"CVE-2026-100815","ts":1790692648623,"field":"cvss","old":null,"new":"8.8"},{"seq":212706,"id":"CVE-2026-100815","ts":1790692648623,"field":"severity","old":"none","new":"high"}]}