---
cve: "CVE-2026-71194"
severity: "MEDIUM"
cvss: 6.8
epss: "0.3%"
vendor: "OpenStack"
kev: false
exploited: false
published: "2026-08-12 22:23:46"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T18:52:28+02:00"
---

# CVE-2026-71194

> 6.8 MEDIUM

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- b5255cf54363bdb0775b51cc0fbf38eeb28aecae (Commit)
- 2ee5e4a00bc632283a4b5c5da1a94d8f184d1272 (Commit)

## Referenzen

- <https://launchpad.net/bugs/2160533>
- <https://security.openstack.org/ossa/OSSA-2026-034.html>
- <https://www.openwall.com/lists/oss-security/2026/08/11/6>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-71194) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_