High7.5Red Hat & Ubuntu Linux
Client-side Denial of Service via malicious SCRAM-SHA-256 authentication
CVE-2026-42198 Published Apr 29, 2026
CVE-2026-42198
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
Client-side Denial of Service via malicious SCRAM-SHA-256 authentication. Red Hat rates this important (CVSS 7.5). Weakness: CWE-770. Affected package(s): postgresql-jdbc, pgjdbc. Resolved in Red Hat advisory RHSA-2026:25030 — update the affected packages (`sudo dnf update`).
Affected versions
- postgresql-jdbc-0:42.2.14-4.el8_10
- postgresql-jdbc-0:42.7.2-1.el10_2.2
- pgjdbc
- postgresql-jdbc-0:42.2.28-2.el9_8.2
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Fixed versions
- RHSA-2026:25030
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Update the affected package(s) to the fixed version shipped in RHSA-2026:25030 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
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