{"id":"CVE-2026-71194","details":"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 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.","modified":"2026-08-15T11:30:56.259377998Z","published":"2026-08-12T22:23:46.951Z","database_specific":{"cwe_ids":["CWE-669"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71194.json","unresolved_ranges":[{"extracted_events":[{"introduced":"22.0.0"},{"fixed":"22.0.2"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"mitre"},"references":[{"type":"WEB","url":"https://opendev.org/openstack/designate"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71194.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71194"},{"type":"ADVISORY","url":"https://security.openstack.org/ossa/OSSA-2026-034.html"},{"type":"REPORT","url":"https://launchpad.net/bugs/2160533"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2026/08/11/6"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://opendev.org/openstack/designate","events":[{"introduced":"bfe79196c9557559f351ae9a854c73ac757051ee"},{"fixed":"b5255cf54363bdb0775b51cc0fbf38eeb28aecae"},{"introduced":"035453ffd1ba0f574a1d7f23b458222c0fd8fc68"},{"fixed":"2ee5e4a00bc632283a4b5c5da1a94d8f184d1272"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"1.0.0"},{"fixed":"20.0.2"},{"introduced":"21.0.0"},{"fixed":"21.0.1"}]}}],"versions":["21.0.0.0rc1","21.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71194.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H"}]}