Reliance on Reverse DNS Resolution for a Security-Critical Action in Jenkins LTS and Jenkins - CVE-2026-33002

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Main Vulnerability Database Vulnerabilities #VU124227

Reliance on Reverse DNS Resolution for a Security-Critical Action in Jenkins LTS and Jenkins - CVE-2026-33002

Published: March 23, 2026


Vulnerability identifier: #VU124227
CSH Severity: High
CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-33002
CWE-ID: CWE-350
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform an Anti DNS Pinning (DNS Rebinding) attack.

The vulnerability exists due to the DNS rebinding issue in WebSocket CLI origin validation. A remote attacker can perform DNS rebinding attack and bypass origin validation on the system.


Affected software

Jenkins LTS
Jenkins

How to mitigate CVE-2026-33002

Install updates from vendor's website.

Jenkins LTS - update to 2.541.3
Jenkins - update to 2.555

External References

Related Security Bulletins