CVE-2026-71193

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-71193
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-12 23:17:22 UTC
Updated2026-08-13 14:17:12 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 9.6 CRITICAL from [email protected]

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

EPSS: 0.005250000 probability, percentile 0.419560000 (date 2026-08-14)

Problem Types: CWE-863 | CWE-863 CWE-863 Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.6CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H
3.1CNACVSS9.6CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OpenStack Designate affected 1.0.0 20.0.2 semver Not specified
CNA OpenStack Designate affected 21.0.0 21.0.1 semver Not specified
CNA OpenStack Designate affected 22.0.0 22.0.1 semver Not specified

References

ReferenceSourceLinkTags
www.openwall.com/lists/oss-security/2026/08/11/6 [email protected] www.openwall.com
launchpad.net/bugs/2160533 [email protected] launchpad.net
security.openstack.org/ossa/OSSA-2026-034.html [email protected] security.openstack.org
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