What is CVE-2026-48921?

CVE-2026-48921 is a high-severity vulnerability in Jenkins Pipeline\, classified under Improper Link Resolution Before File Access. CVSS score: 7.5/10. Published 2026-05-27.

How severe is CVE-2026-48921?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Jenkins Pipeline\

CVE-2026-48921

Jenkins Pipeline: Groovy Libraries Plugin 797.v90ea_a_9b_e45a_0 and earlier does not prohibit symbolic links in shared libraries, allowing attackers able to control the content of a library used by a Pipeline job to read arbitrary files on…

EPSS: 0.004 (61.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Jenkins Pipeline\ — versions _groovy_libraries
Jenkins Project Pipeline: Groovy Libraries Plugin — versions 0

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

jenkinsci-cert@googlegroups.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-48921?: CVE-2026-48921 is a high-severity vulnerability in Jenkins Pipeline\, classified under Improper Link Resolution Before File Access. CVSS score: 7.5/10. Published 2026-05-27.
How severe is CVE-2026-48921?: High severity. CVSS v3 base score is 7.5 out of 10.