{"action":"Upgrade firefox-esr to 153.4.0esr-1~deb13u1 or later.","affected":[{"fixed":"153.4.0esr-1~deb13u1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["153.4.0esr-1~deb13u1"],"id":"tcs_01M5NPHM6A3MX7TQV5HKYBH02V","modified_at":"2026-10-23T17:47:23.451725047Z","published_at":"2026-09-29T13:17:45.073Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-100800","https://security-tracker.debian.org/tracker/CVE-2026-100800"],"severity":{"label":"critical","score":9.6},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-100800#Debian:13/firefox-esr","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-100800"}],"summary":"Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157."}