CVE-2026-48921: Jenkins Pipeline: Groovy Libraries Plugin does not prohibit symbolic links in shared libraries

May 27, 2026 (updated July 1, 2026)

Jenkins Pipeline: Groovy Libraries Plugin 797.v90ea_a_9b_e45a_0 and earlier does not prohibit symbolic links in shared libraries.

This allows attackers able to control the content of a library used by a Pipeline job to read arbitrary files on the Jenkins controller filesystem.

Pipeline: Groovy Libraries Plugin 798.v5cc688825312 prohibits symbolic links in shared libraries.

References

github.com/advisories/GHSA-qjq3-wqj5-g37q
nvd.nist.gov/vuln/detail/CVE-2026-48921
www.jenkins.io/security/advisory/2026-05-27/

Code Behaviors & Features

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