Jenkins Arbitrary File Read Vulnerability Leaks Secrets from C...
A critical arbitrary file read vulnerability in Jenkins allows attackers to extract credentials, API keys, and secrets from CI/CD pipelines.
Executive Summary
CVE-2026-27198 allows unauthenticated file read from Jenkins controller. Attackers can extract encrypted credentials AND the master decryption key, compromising all stored secrets.
Technical Analysis
The CLI-over-HTTP functionality enables file system traversal. Attackers extracting AWS/Azure credentials then pivot to cloud environments. Active exploitation observed.
Remediation
Update to Jenkins 2.442 or LTS 2.426.4. Restrict network access to Jenkins controller. Disable CLI-over-HTTP if patching delayed. Audit and rotate all credentials Jenkins has access to.
References
- Jenkins Security Advisory
https://www.jenkins.io/security/advisory/2026-03-04/
Concerned about this threat?
Our security team can assess your exposure and recommend immediate actions.
Protect Your Organization
Find vulnerabilities like this in your systems before attackers do.
24/7 monitoring to detect and respond to threats like these in real time.
Block phishing and malware delivery targeting your organization.
Map security controls to 26 frameworks including NIST, SOC 2, and HIPAA.