CVE-2026-42198
7.5 · HIGHOverview
CVE-2026-42198 is a high-severity vulnerability affecting postgresql postgresql_jdbc_driver. It was published on April 29, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
pgjdbc is an open source postgresql JDBC Driver. From version 42.2.0 to before version 42.7.11, pgjdbc is vulnerable to a client-side denial of service during SCRAM-SHA-256 authentication. A malicious server can instruct the driver to perform SCRAM authentication with a very large iteration count. With a large enough value, the client spends an unbounded amount of CPU time inside PBKDF2 before authentication can fail. A single attempt ties up a CPU core. Repeated or concurrent attempts exhaust client CPU and can wedge connection pools. In affected versions, loginTimeout did not fully mitigate this problem. When loginTimeout expired, the caller could stop waiting, but the worker thread performing the connection attempt could continue running and burning CPU inside the SCRAM PBKDF2 computation. This issue has been patched in version 42.7.11.
Remediation
Check the references section for vendor advisories and patches from postgresql. Update postgresql_jdbc_driver to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| postgresql | postgresql_jdbc_driver | >= 42.2.0, < 42.7.11 | Affected |
References
Frequently Asked Questions
What is CVE-2026-42198?
CVE-2026-42198 is a high-severity vulnerability affecting postgresql postgresql_jdbc_driver. It was published on April 29, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2026-42198?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-42198?
Check the references section for vendor advisories and patches from postgresql. Update postgresql_jdbc_driver to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-42198?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-42198 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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