CVE-2026-33002: Jenkins has a DNS rebinding vulnerability in WebSocket CLI origin validation

CVE-2026-33002 · Severity: low · CVSS 3.1 · Published 2026-03-18

Jenkins has a DNS rebinding vulnerability in WebSocket CLI origin validation

Technologies: org.jenkins-ci.main:jenkins-core (Maven). Vendors: Maven.

Quick answers

Is CVE-2026-33002 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-33002 being exploited in the wild.
How severe is CVE-2026-33002?
Low severity, with a CVSS score of 3.1, published 18 March 2026.
Which products and versions are affected?
org.jenkins-ci.main:jenkins-core (Maven) ECOSYSTEM:introduced=2.442,fixed=2.555.
Is there a fix for CVE-2026-33002?
Yes. org.jenkins-ci.main:jenkins-core (Maven): upgrade to 2.555 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-33002?
Check whether you run org.jenkins-ci.main:jenkins-core (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • org.jenkins-ci.main:jenkins-core (Maven): upgrade to 2.555 or later
    # set org.jenkins-ci.main:jenkins-core to 2.555 in your pom.xml or build.gradle

Affected products

  • org.jenkins-ci.main:jenkins-core (Maven) ECOSYSTEM:introduced=2.442,fixed=2.555

Identifiers

  • CVE-2026-33002
  • GHSA-phhv-63fh-rrc8

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