{"action":"Upgrade thunderbird to 1:140.7.0esr-1~deb12u1 or later.","affected":[{"fixed":"1:140.7.0esr-1~deb12u1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["1:140.7.0esr-1~deb12u1"],"id":"tcs_01M5NPFCNPF1NPC2XA4PNYGBT2","modified_at":"2026-10-01T03:00:47.808128715Z","published_at":"2026-01-13T14:16:38.270Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-0877","https://security-tracker.debian.org/tracker/CVE-2026-0877"],"severity":{"label":"high","score":8.1},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-0877#Debian:12/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-0877"}],"summary":"Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7."}