SB20260428236 - Allocation of Resources Without Limits or Throttling in Postgresql JDBC Driver

Description

This security bulletin contains information about 1 vulnerability.

1) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-42198)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to allocation of resources without limits or throttling in SCRAM-SHA-256 authentication handling when processing a server-supplied PBKDF2 iteration count. A remote attacker can send a specially crafted SCRAM server-first-message with a very large iteration count to cause a denial of service.

The issue is triggered only when the client uses SCRAM-SHA-256 authentication and reaches a malicious, compromised, or attacker-controlled PostgreSQL endpoint.

Remediation

Install update from vendor's website.

References

• https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-98qh-xjc8-98pq 
• https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-98qh-xjc8-98pq