{"action":"Upgrade thunderbird to 1:140.12.0esr-1~deb12u1 or later.","affected":[{"fixed":"1:140.12.0esr-1~deb12u1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["1:140.12.0esr-1~deb12u1"],"id":"tcs_01M5NQE1CZPQ2G4XAEFMEJEHT5","modified_at":"2026-10-23T17:47:23.720647184Z","published_at":"2026-06-16T13:16:31.180Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-12309","https://security-tracker.debian.org/tracker/CVE-2026-12309"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-12309#Debian:12/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-12309"}],"summary":"Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12."}