{"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_01M5NVEMDGAY7T2KGHBE0KSBSK","modified_at":"2026-09-24T08:47:27.447285730Z","published_at":"2026-09-16T09:17:05.780Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-77955","https://security-tracker.debian.org/tracker/CVE-2026-77955"],"severity":{"label":"medium","score":4.4},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-77955#Debian:13/unbound","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-77955"}],"summary":"In NLnet Labs Unbound 1.13.2 up to and including 1.26.1, a vulnerability in ZONEMD configured zones (zonemd-check: yes) which are located below (but not at) a trust anchor allow for an attack window w"}