TI-2026-49873 Aliases CVE-2026-71193 GHSA-8f9r-f5gr-x4fc

Incorrect authorization in OpenStack Designate

MEDIUM 42CWE-863Published 2026-08-12 · Updated 2026-08-13

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · High · High
Fix status: Partial Red Hat: 4 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-863.

Summary

In OpenStack Designate before 22.0.1, zone creation checks (_is_subzone, _is_superzone, and the duplicate-zone DB constraint) are scoped to the target pool only. An authenticated user can bypass these checks by scheduling a zone to a different pool via the AttributeFilter scheduler, creating an overlapping zone that conflicts with another tenant's zone. This enables cross-tenant DNS hijack (redirecting traffic to attacker-controlled IPs) and DNS denial of service (NODATA responses). Exploitation requires a multi-pool deployment with AttributeFilter enabled in scheduler_filters, which is a non-default but documented and supported configuration for self-service tiering.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00525 44th percentileScored 2026-11-07

Fix Partial Designate (OpenStack): 20.0.2, 21.0.1, 22.0.1Red Hat: 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
OpenStack	Designate	1.0.0 to before 20.0.2; 21.0.0 to before 21.0.1; 22.0.0 to before 22.0.1	20.0.2, 21.0.1, 22.0.1	Patch available	CNA

Designate VendorOpenStack Affected 1.0.0 to before 20.0.2; 21.0.0 to before 21.0.1; 22.0.0 to before 22.0.1 Fixed in 20.0.2, 21.0.1, 22.0.1 Patch available CNA

Remediation

Fix · CNA Designate (OpenStack) Fixed in 20.0.2, 21.0.1, 22.0.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2026-08-12
OpenStack Designate — security.openstack.org/ossa/OSSA-2026-034.html
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-49874 In OpenStack Designate before 22.0.2, the mDNS handler performs pool-blind lookups when…Priority LOW 31
Show all 2 records → Advisory →
Advisory · 2026-08-12
OpenStack Designate — openwall.com/lists/oss-security/2026/08/11/6
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-49874 In OpenStack Designate before 22.0.2, the mDNS handler performs pool-blind lookups when…Priority LOW 31
Show all 2 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat OpenStack Platform 13 (Queens)	Affected	No fix yet: Fix deferred
Red Hat OpenStack Platform 16.2	Affected	No fix yet: Fix deferred
Red Hat OpenStack Platform 17.1	Affected	No fix yet: Fix deferred
Red Hat OpenStack Platform 18.0	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-71193
2026-10-03 Alias added: GHSA-8f9r-f5gr-x4fc

References

Advisory 2

Other 1

https://launchpad.net/bugs/2160533

TI-2026-78562 Incorrect authorization in OpenStack Manila share operations CVSS 3.1CRITICAL 9.9
TI-2026-63467 Code injection in OpenStack Octavia CVSS 4.0CRITICAL 9.4
TI-2017-13226 The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before… CVSS 3.1CRITICAL 9.8
TI-2026-69629 OpenStack Mistral flaw lets users change other projects' resources CVSS 4.0HIGH 7.2
TI-2026-69623 Command injection in OpenStack Mistral std.ssh_proxied action CVSS 4.0HIGH 8.7
TI-2022-17779 Improper privilege management in OpenStack CVSS 3.1HIGH 8.8

See all 332 →

Sources

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