{"action":"Upgrade firefox-esr to 140.9.0esr-1~deb12u1 or later.","affected":[{"fixed":"140.9.0esr-1~deb12u1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["140.9.0esr-1~deb12u1"],"id":"tcs_01M5NSFTQZ3V5Q4965QQB9SQMF","modified_at":"2026-10-01T03:03:24.380869680Z","published_at":"2026-03-24T13:16:07.700Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-4718","https://security-tracker.debian.org/tracker/CVE-2026-4718"],"severity":{"label":"high","score":8.1},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-4718","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-4718"}],"summary":"Undefined behavior in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9."}