Web Application Vulnerabilities Runtime SCA Findings
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Jenkins Reliance on Reverse DNS Resolution for a Security-Critical Action Vulnerability - CVE-2026-33002 - Vulnerability Database
Jenkins

Jenkins Reliance on Reverse DNS Resolution for a Security-Critical Action Vulnerability - CVE-2026-33002

High
Reference: CVE-2026-33002
NVD Link: https://nvd.nist.gov/vuln/detail/CVE-2026-33002
Title: Jenkins Reliance on Reverse DNS Resolution for a Security-Critical Action Vulnerability
Overview:

Jenkins 2.442 through 2.554 (both inclusive) LTS 2.426.3 through LTS 2.541.2 (both inclusive) performs origin validation of requests made through the CLI WebSocket endpoint by computing the expected origin for comparison using the Host or X-Forwarded-Host HTTP request headers making it vulnerable to DNS rebinding attacks that allow bypassing origin validation.