{"action":"Upgrade bind9 to 1:9.20.21-1 or later.","affected":[{"fixed":"1:9.20.21-1","introduced":"0"}],"component":"bind9","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1:9.20.21-1"],"id":"tcs_01M5NRVE04PV9RKQQ6KDWA5K4R","modified_at":"2026-10-01T03:02:38.485037541Z","published_at":"2026-03-25T14:16:37.297Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-3591","https://security-tracker.debian.org/tracker/CVE-2026-3591"],"severity":{"label":"medium","score":5.4},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-3591#Debian:14/bind9","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-3591"}],"summary":"A use-after-return vulnerability exists in the `named` server when handling DNS queries signed with SIG(0). Using a specially-crafted DNS request, an attacker may be able to cause an ACL to improperly"}