CVE-2026-71193

Published: Aug 12, 2026Updated: Sep 9, 2026 Sources: CVE List NVDCWE-863

9.6CRITICAL

NVD MITRE

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:CScope

Changed

Impact

C:NConfidentiality

None

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-863

Affected Products

OpenStack

oss-project·USaka openstack foundation

DesignateOn-premWeb App

Networking Infrastructure / dns-dhcp-ntp

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Initial Access

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References

https://launchpad.net/bugs/2160533

launchpad.net

https://security.openstack.org/ossa/OSSA-2026-034.html

security.openstack.org

https://www.openwall.com/lists/oss-security/2026/08/11/6

openwall.com

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