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Test your applicationsUpgrade RHEL:9 postgresql:15/postgresql-plperl to version 0:15.18-1.module+el9.4.0+24401+d70df5dc or higher.
This issue was patched in RHSA-2026:33441.
Note: Versions mentioned in the description apply only to the upstream postgresql:15/postgresql-plperl package and not the postgresql:15/postgresql-plperl package as distributed by RHEL.
See How to fix? for RHEL:9 relevant fixed versions and status.
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.