CVE-2026-6469

A flaw was found in PostgreSQL where the ALTER TABLE ALTER TYPE command incorrectly reassigns ownership of dependent statistics objects to the current user. This grants the table owner unauthorized privileges to execute DROP STATISTICS and ALTER STATISTICS while locking out the legitimate owner. The overall impact is limited, as standard DROP TABLE operations still correctly remove the affected objects.

This flaw has a Low impact on Red Hat products. It provides minimal privilege escalation, as the improperly granted abilities (DROP STATISTICS and ALTER STATISTICS via ALTER TABLE ALTER TYPE) occur within an already highly privileged context where the table owner can simply use DROP TABLE to remove the statistics objects.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To mitigate this, limit the ALTER TABLE ALTER TYPE command to trusted database users. If the command must be used, manually review and restore the correct ownership of any affected extended statistics objects. Additionally, relying on standard DROP TABLE commands for routine object removal safely avoids the primary impacts of this flaw.