{"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_01M5NRFZRN727619G8Z9W1MRKN","modified_at":"2026-10-01T03:03:08.072306899Z","published_at":"2026-02-24T14:16:27.053Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-2786","https://security-tracker.debian.org/tracker/CVE-2026-2786"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-2786","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-2786"}],"summary":"Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8."}