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.
Advisories
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Fixes
Solution
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Workaround
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References
History
Wed, 12 Aug 2026 22:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| First Time appeared |
Openstack
Openstack designate |
|
| Weaknesses | CWE-669 | |
| CPEs | cpe:2.3:a:openstack:designate:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Openstack
Openstack designate |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-08-12T22:23:46.951Z
Reserved: 2026-08-05T05:15:39.832Z
Link: CVE-2026-71194
No data.
Status : Received
Published: 2026-08-12T23:17:22.170
Modified: 2026-08-12T23:17:22.170
Link: CVE-2026-71194
No data.
OpenCVE Enrichment
Updated: 2026-08-13T00:15:04Z
Weaknesses