{"action":"Upgrade thunderbird to 1:140.13.0esr-1 or later.","affected":[{"fixed":"1:140.13.0esr-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1:140.13.0esr-1"],"id":"tcs_01M5NQQ4769M2FA98NVBS3SWHT","modified_at":"2026-10-01T03:02:26.918033816Z","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#Debian:14/thunderbird","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."}