Description
Missing authorization in PostgreSQL CREATE TYPE allows an object creator to hijack other queries that use search_path to find user-defined types, including extension-defined types. That is to say, the victim will execute arbitrary SQL functions of the attacker's choice. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.
Problem types
Credits
The PostgreSQL project thanks Jelte Fennema-Nio for reporting this problem.
References
www.postgresql.org/support/security/CVE-2026-6472/