CVE-2026-42198

A flaw was found in pgjdbc, an open-source PostgreSQL JDBC Driver. A malicious server can exploit this vulnerability by instructing the driver to perform SCRAM-SHA-256 (Salted Challenge Response Authentication Mechanism Secure Hash Algorithm 256) authentication with an excessively large iteration count. This causes the client to spend an unbounded amount of CPU time performing PBKDF2 (Password-Based Key Derivation Function 2) computations, leading to a client-side Denial of Service (DoS). This can exhaust client CPU resources and wedge connection pools.

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.