{"action":"Upgrade thunderbird to 1:153.4.0esr-1 or later.","affected":[{"fixed":"1:153.4.0esr-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1:153.4.0esr-1"],"id":"tcs_01M5NPH18ACBZ4VXEQSB0HHMFG","modified_at":"2026-10-07T09:47:38.803450300Z","published_at":"2026-09-29T13:17:41.143Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-100769","https://security-tracker.debian.org/tracker/CVE-2026-100769"],"severity":{"label":"high","score":8.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-100769#Debian:14/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-100769"}],"summary":"Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17."}