{"action":"Upgrade thunderbird to 1:140.15.0esr-1~deb12u1 or later.","affected":[{"fixed":"1:140.15.0esr-1~deb12u1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["1:140.15.0esr-1~deb12u1"],"id":"tcs_01M5NVXMA5VTS7SM81DCPKHP2M","modified_at":"2026-10-06T16:01:44.979421222Z","published_at":"2026-09-01T13:20:05.713Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-84119","https://security-tracker.debian.org/tracker/CVE-2026-84119"],"severity":{"label":"critical","score":9.6},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-84119#Debian:12/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-84119"}],"summary":"Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderb"}