CVE-2026-96538: WarehousePG (WHPG) 7.x before 7.6.0-WHPG is affected by a missing authorization vulnerability (CWE-862) in the built-in server-side file functions pg_file

WarehousePG (WHPG) 7.x before 7.6.0-WHPG is affected by a missing authorization vulnerability (CWE-862) in the built-in server-side file functions pg_file_write

WarehousePG (WHPG) 7.x before 7.6.0-WHPG is affected by a missing authorization vulnerability (CWE-862) in the built-in server-side file functions pg_file_write(text,text,bool), pg_file_rename(text,text,text), pg_file_unlink(text), and pg_logdir_ls(). These functions are executable by any authenticated database role with no GRANT required, because the REVOKE that contrib/adminpack applies to the equivalent functions was never carried over to WHPG core when their catalog entries were repointed to the ungated adminpack-derived implementations as part of Greenplum's merge to a PostgreSQL 12 base. A non-superuser can use pg_file_write, pg_file_rename, and pg_file_unlink to create, overwrite (append), rename, and delete files under the data and log directories, and can use pg_logdir_ls() to enumerate log file names. Because postgresql.auto.conf resides in the data directory, a non-superuser can append configuration directives such as shared_preload_libraries or archive_command to it, resulting in arbitrary code execution as the postgres operating system user on the next server restart or configuration reload. WarehousePG 6.x is not affected, as the equivalent functions there enforce a s

Description from the National Vulnerability Database, published by 20be33e2-bf35-4d13-8fad-18bd2f3e3659

What it means for a small business

If your business uses WarehousePG, install the vendor's update. If you're not sure whether you use it, ask whoever manages your computers.

How likely is an attack? The Exploit Prediction Scoring System, run by FIRST (the global association of security response teams), puts the odds of this one being exploited in the next 30 days at 0.32%, higher than 25% of CVEs. That’s low, but low isn’t zero, and the odds jump the day someone publishes an exploit. Scored October 28, 2026, updated daily.

Check your own setup

Website check: reads what your site runs from the outside (WordPress version, plugins it can see, old server software) and matches it against this database.
Server check: what your web server says about itself, and whether that version has known flaws.

Sources

Part of the Huttenlocher Technologies vulnerability database, refreshed twice a day from CISA and the NVD. The title, category and plain-language guidance are ours; check the linked record before acting on a detail. This is general guidance, not a review of your systems.

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