{"action":"Upgrade thunderbird to 1:140.13.0esr-2~deb12u1 or later.","affected":[{"fixed":"1:140.13.0esr-2~deb12u1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["1:140.13.0esr-2~deb12u1"],"id":"tcs_01M5NQPNETPV9TJT3Z0H9HDJ4J","modified_at":"2026-10-01T03:02:26.408789889Z","published_at":"2026-07-21T13:17:03.577Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-16351","https://security-tracker.debian.org/tracker/CVE-2026-16351"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-16351#Debian:12/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-16351"}],"summary":"Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13."}