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numeric_combine() and several other state-combining functions for aggregates cheated for the case of both inputs being NULL: they returned a null pointer without bothering to mark it as a SQL NULL. This was harmless in the expected usage where the result would be passed to the same combine function or a related aggregate final function. But it's bad news from a security standpoint, because now that value can be passed to an internal-accepting function even if said function is strict. While a previous patch prevented such queries from being issued, it seems like good defense-in-depth to expend the few additional lines of code needed to do this properly. Comparable functions such as array_agg_combine() already do so. Reported-by: Amy Burnett (OpenAI Codex Security) Author: Tom Lane <tgl@sss.pgh.pa.us> Backpatch-through: 14 Security: CVE-2026-14680
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/.