{"action":"Upgrade firefox-esr to 140.8.0esr-1~deb12u1 or later.","affected":[{"fixed":"140.8.0esr-1~deb12u1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["140.8.0esr-1~deb12u1"],"id":"tcs_01M5NRFA2RKCC0ENV0C699DZXF","modified_at":"2026-10-01T03:03:01.372708811Z","published_at":"2026-02-24T14:16:24.737Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-2764","https://security-tracker.debian.org/tracker/CVE-2026-2764"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-2764","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-2764"}],"summary":"JIT miscompilation, use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8."}