CVE-2026-71193
- State
- Published
- Severity
- 9.6 Critical
- Published
- Aug 12, 2026
- Updated
- Aug 13, 2026
- Reserved
- Aug 5, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.6 Critical | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H | mitre |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
DesignateOpenStack |
|
References
- https://launchpad.net/bugs/2160533issue-tracking
- https://security.openstack.org/ossa/OSSA-2026-034.htmlvendor-advisory
- https://www.openwall.com/lists/oss-security/2026/08/11/6vendor-advisorymailing-list
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