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REPLICATION users were not previously subject to restrictions on output plugin paths, so they were able to bypass LOAD-time protections during logical decoding. Unfortunately, adding the standard LOAD restrictions now would retroactively require all third-party output plugins to be installed under the $libdir/plugins directory. This would prevent the use of dynamic_library_path, introduce a wire incompatibility for clients, and require all plugin authors to check that their libraries are safe for use by any unprivileged user; we want to avoid that. Instead, introduce an output_plugin_libraries GUC so that DBAs can specify the output plugins that are trusted for use in logical decoding. For simplicity, superusers are subject to the restriction as well (though they're free to modify the GUC at will during a session, so no power is actually lost). The default setting is 'pgoutput, test_decoding'. If other third-party plugins are in use, DBAs will need to modify this parameter after they update. Some pointers have been added to the documentation to assist with this. Author: Jacob Champion <jacob.champion@enterprisedb.com> Reported-by: Vladimir Tokarev <vladimirelitokarev@gmail.com> Reported-by: Yu Kunpeng <yu443940816@live.com> Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de> Reviewed-by: Noah Misch <noah@leadboat.com> Reviewed-by: Robert Haas <robertmhaas@gmail.com> Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Backpatch-through: 14 Security: CVE-2026-6471
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.