{"action":"Upgrade firefox-esr to 140.12.0esr-1 or later.","affected":[{"fixed":"140.12.0esr-1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["140.12.0esr-1"],"id":"tcs_01M5NQDTWQSZX7GCHEFDAPRNBX","modified_at":"2026-10-27T09:47:41.860716986Z","published_at":"2026-06-16T13:16:29.833Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-12296","https://security-tracker.debian.org/tracker/CVE-2026-12296"],"severity":{"label":"critical","score":9.6},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-12296#Debian:14/firefox-esr","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-12296"}],"summary":"Sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12."}