CVE-2026-6637

A flaw was found in PostgreSQL. A stack buffer overflow in the 'refint' module allows an unprivileged database user to execute arbitrary code as the operating system user running the database. Additionally, a separate vulnerability exists where, if an application uses a user-controlled column as a 'refint' cascade primary key and allows user-controlled updates, a SQL injection can enable an attacker to execute arbitrary SQL commands as the database user performing the update.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.