Link following in Pipeline: Groovy Libraries - CVE-2026-48921
Published: May 28, 2026
Vulnerability identifier: #VU132683
CSH Severity: Medium
CVSS v4: 6 [CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-48921
CWE-ID: CWE-59
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to sensitive information on the system.
The vulnerability exists due to the affected plugin does not prohibit symbolic links in shared libraries. A remote user can read arbitrary files on the Jenkins controller filesystem.
Affected software
Pipeline: Groovy Libraries
How to mitigate CVE-2026-48921
Install updates from vendor's website.
Pipeline: Groovy Libraries - update to 798.v5cc688825312