{"id":"CVE-2026-100778","title":"Sandbox escape due to use-after-free in the DOM: Core & HTML component","summary":"Sandbox escape due to use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.","severity":"none","vendor":"Mozilla","product":"Firefox","affected":["Firefox"],"published":"2026-09-29","updated":"2026-09-29","sourceUpdated":"2026-09-29T13:17:42.577","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-100778","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2068406","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"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-98/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-99/","label":"security@mozilla.org"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-29T13:34:31.661Z","slug":"CVE-2026-100778","body":"## Overview\n\nSandbox escape due to use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}