High [CVE-2026-42198] Client-side Denial of Service via malicious SCRAM-SHA-256 authentication
This high-severity Red Hat Linux advisory covers CVE-2026-42198 affecting Red Hat AMQ Broker 7, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.
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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 products named by the advisory: Red Hat AMQ Broker 7; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 10.0 Extended Update Support; and 5 more.
- 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 2 months ago·verify at source
- RHSA-2026:25030
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- 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 2 months ago·verify at source
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