Reliance on Reverse DNS Resolution for a Security-Critical Action in Jenkins and Jenkins LTS - CVE-2026-33002
Published: March 23, 2026
Vulnerability identifier: #VU124227
CSH Severity: High
CVSS v4.0: 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/E:U/U:Amber
CVE-ID: CVE-2026-33002
CWE-ID: CWE-350
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Jenkins
Affected software:
Jenkins
Jenkins LTS
Jenkins
Jenkins LTS
Detailed vulnerability description
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.
How to mitigate CVE-2026-33002
Install updates from vendor's website.