{"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_01M5NPFH1NWPD0NQ6JG2D8G6J0","modified_at":"2026-10-01T03:00:14.153039519Z","published_at":"2026-01-13T14:16:38.950Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-0884","https://security-tracker.debian.org/tracker/CVE-2026-0884"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-0884#Debian:12/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-0884"}],"summary":"Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7."}