CVE-2026-14662

A flaw was found in PostgreSQL. An unprivileged database user can exploit an integer wraparound vulnerability in the tsvector and tsquery data type functions. By providing crafted large inputs, the server can be forced to undersize an allocation, leading to an out-of-bounds write. This could potentially allow an attacker to execute arbitrary code as the operating system user running the database.

This is an Important vulnerability in PostgreSQL where an unprivileged database user could achieve arbitrary code execution due to an integer wraparound in tsvector and tsquery functions. While direct exploitation by application users is considered unlikely as these functions are typically used by application logic, the flaw could still be leveraged in specific scenarios where crafted large inputs are processed.

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.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.