What is CVE-2026-57284?

CVE-2026-57284 is a medium-severity vulnerability in Jenkins Pipeline\, classified under Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection). CVSS score: 4.3/10. Published 2026-06-24.

How severe is CVE-2026-57284?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Jenkins Pipeline\

CVE-2026-57284

Jenkins Pipeline: Groovy Plugin 4331.v9d06ed4658ff and earlier does not restrict the types that can be instantiated through the Pipeline Snippet Generator, allowing attackers to instantiate types related to job or system configuration othe…

EPSS: 0.003 (19.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Affected products

Jenkins Pipeline\ — versions _groovy
Jenkins Project Pipeline: Groovy Plugin — versions 0

Weakness classification (CWE)

CWE-470 — Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection)

References

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

Frequently asked questions

What is CVE-2026-57284?: CVE-2026-57284 is a medium-severity vulnerability in Jenkins Pipeline\, classified under Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection). CVSS score: 4.3/10. Published 2026-06-24.
How severe is CVE-2026-57284?: Medium severity. CVSS v3 base score is 4.3 out of 10.