{"action":"Upgrade thunderbird to 1:140.9.0esr-1~deb13u1 or later.","affected":[{"fixed":"1:140.9.0esr-1~deb13u1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1:140.9.0esr-1~deb13u1"],"id":"tcs_01M5NSESX2HKBJ2PWDX4NT7R9P","modified_at":"2026-10-01T03:03:15.930506770Z","published_at":"2026-03-24T13:16:04.210Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-4684","https://security-tracker.debian.org/tracker/CVE-2026-4684"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-4684#Debian:13/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-4684"}],"summary":"Race condition, use-after-free in the Graphics: WebRender component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9."}