{"action":"Upgrade thunderbird to 1:140.8.0esr-1 or later.","affected":[{"fixed":"1:140.8.0esr-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1:140.8.0esr-1"],"id":"tcs_01M5NRFFB3RVE3DTGPMAFVYVYB","modified_at":"2026-10-01T03:03:01.430788862Z","published_at":"2026-02-24T14:16:25.397Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-2770","https://security-tracker.debian.org/tracker/CVE-2026-2770"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-2770#Debian:14/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-2770"}],"summary":"Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8."}