Main Vulnerability Database Vulnerabilities #VU141044

Link following in Jenkins and Jenkins LTS - CVE-2026-70427

Published: August 6, 2026

Vulnerability identifier: #VU141044

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-70427

CWE-ID: CWE-59

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to an insecure link following issue during the extraction of .tar and .tar.gz archives. A remote user can create a specially crafted symbolic link to a critical file on the system and overwrite it with privileges of the application.

Affected software

Jenkins
Jenkins LTS

How to mitigate CVE-2026-70427

Install updates from vendor's website.

Jenkins - update to 2.576
Jenkins LTS - update to 2.568.2

External References

https://www.jenkins.io/security/advisory/2026-08-05/#SECURITY-3930

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