CVE-2026-71194
Last modified
CVE-2026-71194 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. 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. EPSS estimates a 0.30% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| OpenStack | Designate | >= 1.0.0, < 20.0.2; >= 21.0.0, < 21.0.1; >= 22.0.0, < 22.0.2 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
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