{"id":"CVE-2026-71194","title":"In OpenStack Designate before 22.0.2, the mDNS handler performs pool-blind lookups when resolving record queries and NOTIFY requests","summary":"In OpenStack Designate before 22.0.2, the mDNS handler performs pool-blind lookups when resolving record queries and NOTIFY requests. When two zones with the same name exist across different pools, the lookup fails with a deterministic e…","severity":"medium","cvss":6.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","cwe":["CWE-669"],"published":"2026-08-12","updated":"2026-09-09","sourceUpdated":"2026-09-09T16:03:22.897","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-71194","references":[{"url":"https://launchpad.net/bugs/2160533","label":"cve@mitre.org"},{"url":"https://security.openstack.org/ossa/OSSA-2026-034.html","label":"cve@mitre.org"},{"url":"https://www.openwall.com/lists/oss-security/2026/08/11/6","label":"cve@mitre.org"}],"tags":["nvd"],"epss":0.00305,"epssPercentile":0.23403,"ingestedAt":"2026-09-09T16:14:05.512Z","slug":"CVE-2026-71194","body":"## Overview\n\nIn OpenStack Designate before 22.0.2, the mDNS handler performs pool-blind lookups when resolving record queries and NOTIFY requests. When two zones with the same name exist across different pools, the lookup fails with a deterministic error, causing the handler to return REFUSED for all DNS queries through that path. The _handle_notify path is exploitable via a single unauthenticated UDP packet. This is independently reachable through the cross-tenant zone overlap described in a different recent CVE, and also affects legitimate same-tenant cross-pool configurations. BIND9 views do not mitigate this issue as mDNS is a shared service upstream of any view configuration.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":37.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}