{"action":"Upgrade thunderbird to 1:140.8.0esr-1~deb12u1 or later.","affected":[{"fixed":"1:140.8.0esr-1~deb12u1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["1:140.8.0esr-1~deb12u1"],"id":"tcs_01M5NRFJVRR1M1PMDZPSK8WGGV","modified_at":"2026-10-01T03:03:01.629692277Z","published_at":"2026-02-24T14:16:26.023Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-2776","https://security-tracker.debian.org/tracker/CVE-2026-2776"],"severity":{"label":"critical","score":10},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-2776#Debian:12/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-2776"}],"summary":"Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148"}