{"id":"CVE-2026-71193","details":"In OpenStack Designate before 22.0.1, zone creation checks (_is_subzone, _is_superzone, and the duplicate-zone DB constraint) are scoped to the target pool only. An authenticated user can bypass these checks by scheduling a zone to a different pool via the AttributeFilter scheduler, creating an overlapping zone that conflicts with another tenant's zone. This enables cross-tenant DNS hijack (redirecting traffic to attacker-controlled IPs) and DNS denial of service (NODATA responses). Exploitation requires a multi-pool deployment with AttributeFilter enabled in scheduler_filters, which is a non-default but documented and supported configuration for self-service tiering.","modified":"2026-08-14T04:04:08.373866479Z","published":"2026-08-12T22:17:12.516Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71193.json","cna_assigner":"mitre","cwe_ids":["CWE-863"]},"references":[{"type":"WEB","url":"https://opendev.org/openstack/designate"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71193.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71193"},{"type":"ADVISORY","url":"https://security.openstack.org/ossa/OSSA-2026-034.html"},{"type":"ADVISORY","url":"https://www.openwall.com/lists/oss-security/2026/08/11/6"},{"type":"REPORT","url":"https://launchpad.net/bugs/2160533"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://opendev.org/openstack/designate","events":[{"introduced":"bfe79196c9557559f351ae9a854c73ac757051ee"},{"fixed":"b5255cf54363bdb0775b51cc0fbf38eeb28aecae"},{"introduced":"035453ffd1ba0f574a1d7f23b458222c0fd8fc68"},{"fixed":"2ee5e4a00bc632283a4b5c5da1a94d8f184d1272"},{"introduced":"ee2add08760a436d0173535699a6016ef18e03ae"},{"fixed":"d4b703bb4637e6e740e4b401eac6e9308769c39f"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"1.0.0"},{"fixed":"20.0.2"},{"introduced":"21.0.0"},{"fixed":"21.0.1"},{"introduced":"22.0.0"},{"fixed":"22.0.1"}]}}],"versions":["22.0.0.0rc1","22.0.0","21.0.0.0rc1","21.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71193.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H"}]}