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

CVE-2026-71194 is fixed in designate on 1 platform, first by DEBIAN-CVE-2026-71194, released August 17, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-71194
- Priority: Routine
- CVSS: 6.8 (medium)
- EPSS: 0.0052
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 12, 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | designate Debian 12.15 (bookworm) | 1:15.0.2-0+deb11u1 | [DEBIAN-CVE-2026-71194](https://patchblox.com/security/data/fix/linux/debian-cve-2026-71194.md) | Aug 17, 2026 |
| Linux | designate Debian 13.5 (trixie) | 1:20.0.0-2+deb13u1 | [DEBIAN-CVE-2026-71194](https://patchblox.com/security/data/fix/linux/debian-cve-2026-71194.md) | Aug 17, 2026 |
| Linux | designate Debian 14 | 1:22.0.0-2 | [DEBIAN-CVE-2026-71194](https://patchblox.com/security/data/fix/linux/debian-cve-2026-71194.md) | Aug 17, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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