Symlink Vulnerability in Jenkins Project Affecting File Access Permissions
CVE-2026-19429

6.5MEDIUM

Key Information:

Vendor

Jenkins
Status
Jenkins
Vendor
CVE Published:
10 August 2026

What is CVE-2026-19429?

An insufficient patch in Jenkins allows an authenticated remote attacker with Item/Configure permission to exploit the system via crafted tar archives. This flaw permits unauthorized reading of arbitrary files on the Jenkins controller filesystem, including sensitive data such as secrets and configuration files. The security update intended to validate symlink destinations but failed to restrict symlink targets effectively, compromising the integrity of the Jenkins environment.

References

https://github.com/jenkinsci/jenkins
third-party-advisory
https://www.jenkins.io/security/advisories/2026-03-19/
vendor-advisory

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jamshid (TuranSec)
.