{"action":"Upgrade firefox-esr to 140.13.0esr-1~deb12u1 or later.","affected":[{"fixed":"140.13.0esr-1~deb12u1","introduced":"0"}],"component":"firefox-esr","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["140.13.0esr-1~deb12u1"],"id":"tcs_01M5NQQ3R8K6FGCQKP4WZXNJ0H","modified_at":"2026-10-25T09:47:30.862606276Z","published_at":"2026-07-21T13:17:13.863Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-16387","https://security-tracker.debian.org/tracker/CVE-2026-16387"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-16387","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-16387"}],"summary":"Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13."}