{"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_01M5NT0KSFNGBT5QT59RSP7367","modified_at":"2026-10-01T03:03:26.786236967Z","published_at":"2026-07-22T14:17:21.537Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-55717","https://security-tracker.debian.org/tracker/CVE-2026-55717"],"severity":{"label":"medium","score":5.9},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-55717#Debian:13/unbound","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-55717"}],"summary":"In NLnet Labs Unbound 1.10.0 up to and including 1.25.1, when 'serve-expired: yes' is set together with a 'response-ip: <net> redirect' /'response-ip-data: <net> CNAME <target>' rule (or the RPZ 'rpz-"}