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CVE-2026-42578VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat build of Quarkus 3.33.2 release and security update

Affects Red HatSource GCVE Database

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Mentioned vulnerabilities

Not known to be exploited.

Data as of 1 Nov 2026, 00:38 UTC

Severity
High

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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Jun 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 31 Oct 2026.

What to do

AI-suggested

Red Hat has provided an official security update in Quarkus version 3.33.2 that addresses these vulnerabilities. Users should apply this update promptly after ensuring all previously released relevant errata are installed. Detailed instructions for applying the update are available in the Red Hat advisory. No additional mitigation actions are indicated beyond applying the official update.

Description

Red Hat has released an important security update for its build of Quarkus, version 3.33.2, which addresses multiple vulnerabilities in the Netty components used by Quarkus. The update fixes issues including HTTP header injection, HTTP request smuggling, incorrect HTTP response parsing, denial of service via unbounded memory allocation, and improper DNS domain name constraint enforcement. These vulnerabilities affect the Netty handler proxy, HTTP codec, and DNS codec components. The update is recommended to mitigate these security risks.

References

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