PostgreSQL DDL Auth Bypass Enables DoS on ALTER/ DROP Type (pre-18.5)
CVE-2026-6470 Published on August 13, 2026
PostgreSQL fails to check type USAGE privilege
Missing authorization in PostgreSQL DDL commands allows an object creator to achieve denial of service against ALTER and DROP of the type, via creating a dependency on the type. Many DDL operations did check the privilege, but assigning a range subtype and referencing the type from an SQL expression did not. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.
Weakness Type
What is an AuthZ Vulnerability?
The software does not perform an authorization check when an actor attempts to access a resource or perform an action.
CVE-2026-6470 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-6470
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