Critical (9.9) in jenkins groovy libraries. EPSS 1.5% chance of exploitation in the next 30 days. Fixed in io.jenkins.plugins:pipeline-groovy-lib 613.v9c41a_160233f.
A sandbox bypass vulnerability in Jenkins Pipeline: Groovy Libraries Plugin 612.v84da_9c54906d and earlier allows attackers with permission to define untrusted Pipeline libraries and to define and run sandboxed scripts, including Pipelines, to bypass the sandbox protection and execute arbitrary code in the context of the Jenkins controller JVM.
Severity
CVSS 3.1
9.9 critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS
1.5% chance of exploitation in the next 30 days; higher than 73% of CVEs (scores of 2026-10-31)