{"action":"Upgrade firefox-esr to 140.15.0esr-1~deb13u1 or later.","affected":[{"fixed":"140.15.0esr-1~deb13u1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["140.15.0esr-1~deb13u1"],"id":"tcs_01M5NVXRHQWCSW2K215RFA1482","modified_at":"2026-10-06T16:02:24.919693072Z","published_at":"2026-09-01T13:20:08.457Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-84143","https://security-tracker.debian.org/tracker/CVE-2026-84143"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-84143#Debian:13/firefox-esr","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-84143"}],"summary":"Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we p"}