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CVE-2026-42198VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat build of Quarkus 3.27.3.SP2 security update

Affects Red HatSource GCVE Database

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Not known to be exploited.

Data as of 6 Nov 2026, 02:06 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 May 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 released an update in Quarkus version 3.27.3.SP2 that fixes this vulnerability. Users should apply this update after ensuring all previous relevant errata have been applied. Detailed update instructions are available from Red Hat's official documentation.

Description

A security update for Red Hat build of Quarkus 3.27.3.SP2 addresses CVE-2026-42198, a client-side denial of service vulnerability in the pgjdbc component via malicious SCRAM-SHA-256 authentication. This vulnerability could allow an attacker to disrupt client operations. The update includes a fix for this issue.

References

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