CVE-2026-71194 (GCVE-0-2026-71194)
Vulnerability from cvelistv5 – Published: 2026-08-12 22:23 – Updated: 2026-08-13 13:32
VLAI
EPSS
VEX
Summary
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.
Severity
6.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 13:31 UTC
CWE
- CWE-669 - Incorrect Resource Transfer Between Spheres
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://launchpad.net/bugs/2160533 | issue-tracking |
| https://security.openstack.org/ossa/OSSA-2026-034.html | vendor-advisory |
| https://www.openwall.com/lists/oss-security/2026/… | issue-trackingvendor-advisorymailing-list |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| OpenStack | Designate |
Affected:
1.0.0 , < 20.0.2
(semver)
Affected: 21.0.0 , < 21.0.1 (semver) Affected: 22.0.0 , < 22.0.2 (semver) cpe:2.3:a:openstack:designate:*:*:*:*:*:*:*:* cpe:2.3:a:openstack:designate:*:*:*:*:*:*:*:* cpe:2.3:a:openstack:designate:*:*:*:*:*:*:*:* |
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Sightings
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.