CVE-2026-71194 PUBLISHED

Assigner: mitre
Reserved: 05.08.2026 Published: 12.08.2026 Updated: 13.08.2026

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

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS Score: 6.8

Product Status

Vendor OpenStack
Product Designate
Versions Default: unaffected
  • affected from 1.0.0 to 20.0.2 (excl.)
  • affected from 21.0.0 to 21.0.1 (excl.)
  • affected from 22.0.0 to 22.0.2 (excl.)

References

Problem Types

  • CWE-669 Incorrect Resource Transfer Between Spheres CWE