{"api_version":"1","generated_at":"2026-08-20T09:21:40+00:00","cve":"CVE-2026-71194","urls":{"html":"https://cve.report/CVE-2026-71194","api":"https://cve.report/api/cve/CVE-2026-71194.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-71194","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-71194"},"summary":{"title":"CVE-2026-71194","description":"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.","state":"PUBLISHED","assigner":"mitre","published_at":"2026-08-12 23:17:22","updated_at":"2026-08-13 14:17:12"},"problem_types":["CWE-669","CWE-669 CWE-669 Incorrect Resource Transfer Between Spheres"],"metrics":[{"version":"3.1","source":"cve@mitre.org","type":"Secondary","score":"6.8","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","baseScore":6.8,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"6.8","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","data":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.8,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://www.openwall.com/lists/oss-security/2026/08/11/6","name":"https://www.openwall.com/lists/oss-security/2026/08/11/6","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://launchpad.net/bugs/2160533","name":"https://launchpad.net/bugs/2160533","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://security.openstack.org/ossa/OSSA-2026-034.html","name":"https://security.openstack.org/ossa/OSSA-2026-034.html","refsource":"cve@mitre.org","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-71194","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71194","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"OpenStack","product":"Designate","version":"affected 1.0.0 20.0.2 semver","platforms":[]},{"source":"CNA","vendor":"OpenStack","product":"Designate","version":"affected 21.0.0 21.0.1 semver","platforms":[]},{"source":"CNA","vendor":"OpenStack","product":"Designate","version":"affected 22.0.0 22.0.2 semver","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"71194","cve":"CVE-2026-71194","epss":"0.005090000","percentile":"0.409630000","score_date":"2026-08-14","updated_at":"2026-08-15 00:04:44"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-71194","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-08-13T13:31:40.754720Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-08-13T13:32:41.548Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Designate","repo":"https://opendev.org/openstack/designate","vendor":"OpenStack","versions":[{"lessThan":"20.0.2","status":"affected","version":"1.0.0","versionType":"semver"},{"lessThan":"21.0.1","status":"affected","version":"21.0.0","versionType":"semver"},{"lessThan":"22.0.2","status":"affected","version":"22.0.0","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:openstack:designate:*:*:*:*:*:*:*:*","versionEndExcluding":"20.0.2","versionStartIncluding":"1.0.0","vulnerable":true},{"criteria":"cpe:2.3:a:openstack:designate:*:*:*:*:*:*:*:*","versionEndExcluding":"21.0.1","versionStartIncluding":"21.0.0","vulnerable":true},{"criteria":"cpe:2.3:a:openstack:designate:*:*:*:*:*:*:*:*","versionEndExcluding":"22.0.2","versionStartIncluding":"22.0.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.8,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-669","description":"CWE-669 Incorrect Resource Transfer Between Spheres","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-12T22:23:46.951Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","shortName":"mitre"},"references":[{"tags":["issue-tracking"],"url":"https://launchpad.net/bugs/2160533"},{"tags":["vendor-advisory"],"url":"https://security.openstack.org/ossa/OSSA-2026-034.html"},{"tags":["issue-tracking","vendor-advisory","mailing-list"],"url":"https://www.openwall.com/lists/oss-security/2026/08/11/6"}],"x_generator":{"engine":"CVE-Request-form 0.0.1"}}},"cveMetadata":{"assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","assignerShortName":"mitre","cveId":"CVE-2026-71194","datePublished":"2026-08-12T22:23:46.951Z","dateReserved":"2026-08-05T05:15:39.832Z","dateUpdated":"2026-08-13T13:32:41.548Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-12 23:17:22","lastModifiedDate":"2026-08-13 14:17:12","problem_types":["CWE-669","CWE-669 CWE-669 Incorrect Resource Transfer Between Spheres"],"metrics":{"cvssMetricV31":[{"source":"cve@mitre.org","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","baseScore":6.8,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.2,"impactScore":4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-13T13:31:40.754720Z","id":"CVE-2026-71194","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"71194","Ordinal":"1","Title":"CVE-2026-71194","CVE":"CVE-2026-71194","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"71194","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"CVE-2026-71194"}]}}}