{"action":"Upgrade thunderbird to 1:140.12.0esr-1~deb13u1 or later.","affected":[{"fixed":"1:140.12.0esr-1~deb13u1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1:140.12.0esr-1~deb13u1"],"id":"tcs_01M5NQE51V18RPBMFV0SC90XRW","modified_at":"2026-10-27T09:47:32.431592694Z","published_at":"2026-06-16T13:16:32.147Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-12315","https://security-tracker.debian.org/tracker/CVE-2026-12315"],"severity":{"label":"critical","score":9.1},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-12315#Debian:13/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-12315"}],"summary":"Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12."}