{"action":"Upgrade thunderbird to 1:140.14.0esr-1 or later.","affected":[{"fixed":"1:140.14.0esr-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1:140.14.0esr-1"],"id":"tcs_01M5NVBXW9SKQCF3BF0E4Z7HZM","modified_at":"2026-10-01T03:03:34.599925605Z","published_at":"2026-08-18T13:17:35.160Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-74974","https://security-tracker.debian.org/tracker/CVE-2026-74974"],"severity":{"label":"medium","score":5.4},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-74974#Debian:14/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-74974"}],"summary":"Same-origin policy bypass in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140."}