CVE-2026-71194 (GCVE-0-2026-71194)
Vulnerability from cvelistv5
Published
2026-08-12 22:23
Modified
2026-08-13 13:32
Severity ?
6.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE
  • CWE-669 - Incorrect Resource Transfer Between Spheres
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 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.
References
Impacted products
Vendor Product Version
OpenStack Designate Version: 1.0.0   ≤
Version: 21.0.0   ≤
Version: 22.0.0   ≤
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