{"action":"Upgrade thunderbird to 1:140.9.1esr-1 or later.","affected":[{"fixed":"1:140.9.1esr-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1:140.9.1esr-1"],"id":"tcs_01M5NT2YF4YEKHA1P81AT73D2Z","modified_at":"2026-10-25T09:47:32.990912741Z","published_at":"2026-04-07T13:16:47.347Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-5731","https://security-tracker.debian.org/tracker/CVE-2026-5731"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-5731#Debian:14/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-5731"}],"summary":"Memory safety bugs present in Firefox ESR 115.34.0, Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and w"}