# CVE-2026-71194

## Summary

- **CVE ID:** CVE-2026-71194
- **Severity:** MEDIUM
- **CVSS Score:** 6.8 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H)
- **CWE:** CWE-669
- **Published:** Aug 12, 2026
- **Last Modified:** Aug 13, 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.

## Affected Products

- OpenStack — Designate (1.0.0)
- OpenStack — Designate (21.0.0)
- OpenStack — Designate (22.0.0)

## References

- [CNA](https://launchpad.net/bugs/2160533)
- [CNA](https://security.openstack.org/ossa/OSSA-2026-034.html)
- [CNA](https://www.openwall.com/lists/oss-security/2026/08/11/6)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.30%
- **EPSS Percentile:** 23.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._