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6.8 Medium

CVE-2026-71194 In OpenStack Designate before 22.0.2, the mDNS handler performs pool-blind lookups when resolving record queries and…

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.

Affected products and versions

Product Affected versions Fixed in
Designate 22.0 22.0.0 → < 22.0.2 22.0.2
Designate 21.0 21.0.0 → < 21.0.1 21.0.1
Designate 1.0 1.0.0 → < 20.0.2 20.0.2

References

Timeline

  1. Published
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Other CVEs of Designate

The 2 CVEs of Designate →
CVE-2026-71193 In OpenStack Designate before 22.0.1, zone creation checks (_is_subzone, _is_superzone, and the duplicate-zone DB… 9.6 Critical
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