{"action":"Upgrade thunderbird to 1:153.4.0esr-1 or later.","affected":[{"fixed":"1:153.4.0esr-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1:153.4.0esr-1"],"id":"tcs_01M5NPHMDQYB2F8BX10T9JD8C4","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:14/thunderbird","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."}