{"action":"Upgrade thunderbird to 1:140.11.0esr-1 or later.","affected":[{"fixed":"1:140.11.0esr-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1:140.11.0esr-1"],"id":"tcs_01M5NW80TQS8ZW0ASJ29AC5V0W","modified_at":"2026-10-15T09:47:29.969112772Z","published_at":"2026-05-19T14:16:51.943Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-8956","https://security-tracker.debian.org/tracker/CVE-2026-8956"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-8956#Debian:14/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-8956"}],"summary":"Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11."}