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 the Jenkins controller filesystem.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (21.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.003 · change: -0.001
Affected products
- Jenkins Pipeline\ — versions _groovy_libraries
- Jenkins Pipeline\: Groovy Libraries
- Jenkins Project Pipeline: Groovy Libraries Plugin — versions 0
Weakness classification (CWE)
References
- www.jenkins.io/security/advisory/2026-05-27/ (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.