CVE-2026-71194

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.

CVSS v3 6.8 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://launchpad.net/bugs/2160533
https://security.openstack.org/ossa/OSSA-2026-034.html
https://www.openwall.com/lists/oss-security/2026/08/11/6

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-12 23:17

Updated : 2026-09-09 16:03

NVD link : CVE-2026-71194

Mitre link : CVE-2026-71194

CVE.ORG link : CVE-2026-71194

JSON object : View

Products Affected

No product.

CWE

CWE-669

Incorrect Resource Transfer Between Spheres

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