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CVE-2026-42198VulnerabilityPublished Updated

Red Hat Security Advisory: postgresql-jdbc security update

Affects Red Hat postgresql-jdbcSource GCVE Database

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Not known to be exploited.

Data as of 6 Nov 2026, 02:02 UTC

Severity
High

Rated by Threat Radar · CVSS not yet scored by NVD

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

AI-suggested

Red Hat has provided an updated postgresql-jdbc package (version 42.2.3-7.el8_4.1) that fixes this vulnerability. Users of affected Red Hat Enterprise Linux 8.4 variants should apply the security update as detailed in Red Hat advisory RHSA-2026:59278 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are specified or required beyond applying the official patch.

Description

A security vulnerability (CVE-2026-42198) affecting the postgresql-jdbc package allows a client-side denial of service via malicious SCRAM-SHA-256 authentication. This issue impacts Java applications using the PostgreSQL JDBC driver. Red Hat has issued an important security update for affected versions in Red Hat Enterprise Linux 8.4 variants.

References

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