CVE-2018-1000866: Jenkins Pipeline: Groovy

High severity, CVSS 8.8. EPSS: 1.6% chance of exploitation in the next 30 days.

A sandbox bypass vulnerability exists in Pipeline: Groovy Plugin 2.59 and earlier in groovy-sandbox/src/main/java/org/kohsuke/groovy/sandbox/SandboxTransformer.java, groovy-cps/lib/src/main/java/com/cloudbees/groovy/cps/SandboxCpsTransformer.java that allows attackers with Job/Configure permission, or unauthorized attackers with SCM commit privileges and corresponding pipelines based on Jenkinsfiles set up in Jenkins, to execute arbitrary code on the Jenkins master JVM

Affected products

• Jenkins Pipeline: Groovy: up to and including 2.59
• Red Hat Openshift Container Platform: version 3.11 only

Published 2018-12-10. Last modified 2026-06-17.