{"action":"Upgrade unbound to 1.26.1-0+deb13u1 or later.","affected":[{"fixed":"1.26.1-0+deb13u1","introduced":"0"}],"component":"unbound","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1.26.1-0+deb13u1"],"id":"tcs_01M5NRY3WZP7SWRE8KATH5FB9W","modified_at":"2026-10-25T10:00:54.802840350Z","published_at":"2026-07-22T14:17:18.437Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-40691","https://security-tracker.debian.org/tracker/CVE-2026-40691"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-40691#Debian:13/unbound","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-40691"}],"summary":"In Unbound 1.9.0 up to and including 1.25.1, when a DNSCrypt query is received over TCP, the routine that encrypts the reply in place fails to bound the reply length against the destination buffer siz"}