{"action":"Upgrade unbound to 1.25.2-1 or later.","affected":[{"fixed":"1.25.2-1","introduced":"0"}],"component":"unbound","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1.25.2-1"],"id":"tcs_01M5NT13Y94AVDPNN29AWXP04Z","modified_at":"2026-10-25T10:00:57.992591470Z","published_at":"2026-07-22T14:17:21.957Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-55991","https://security-tracker.debian.org/tracker/CVE-2026-55991"],"severity":{"label":"medium","score":5.9},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-55991#Debian:14/unbound","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-55991"}],"summary":"In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, a remote unauthenticated client can trigger a libngtcp2 assertion (if compiled with assertions on) and terminate the entire Unbound process usi"}