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NVD 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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
CVE-2026-71193 OpenStack Designate Zone Creation Bypass Enables Cross-Tenant DNS Hijack https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-71193
Post summary
The entry lists CVE‑2026‑71193 with a headline that describes a zone‑creation bypass leading to cross‑tenant DNS hijack, but provides no further technical depth, exploit code, or mitigation guidance.