CVE-2026-71193
CVE-2026-71193: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityMedium4.3
Medium [CVE-2026-71193] cross-tenant DNS zone overlap via pool-scoped ownership checks when using AttributeFilter scheduler
CVE-2026-71193Source published Source updated
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. The database uniqueness constraint on zone names is pool-scoped, and the subzone/superzone ownership checks in the…
- Affected products in this advisory
- Red Hat OpenStack Platform 13 (Queens)
- Red Hat OpenStack Platform 16.2
- Red Hat OpenStack Platform 17.1
- Red Hat OpenStack Platform 18.0
- Source-reported affected versions
- < 22.0.1
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- For deployments not using multi-pool DNS: verify that the 'scheduler_filters' configuration option in the [service:central] section only contains 'default_pool' (the default value). This prevents tenants from selecting alternative pools and eliminates the zone overlap vulnerability. For deployments using multi-pool DNS: replace the 'attribute' filter with 'pool_id_attribute' in the 'scheduler_filters' configuration. The pool_id_attribute filter enforces the 'zone_create_forced_pool' policy check, which defaults to requiring the SYSTEM_ADMIN role, preventing regular tenants from choosing pools.
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