CVE-2026-71194
- State
- Published
- Severity
- 6.8 Medium
- Published
- Aug 12, 2026
- Updated
- Aug 13, 2026
- Reserved
- Aug 5, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.8 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H | mitre |
Weaknesses
- CWE-669 Incorrect Resource Transfer Between Spheres
Affected Products
| Product | Versions |
|---|---|
DesignateOpenStack |
|
References
- https://launchpad.net/bugs/2160533issue-tracking
- https://security.openstack.org/ossa/OSSA-2026-034.htmlvendor-advisory
- https://www.openwall.com/lists/oss-security/2026/08/11/6issue-trackingvendor-advisorymailing-list
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