CVE-2026-84661
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Missing Permission Check in Jenkins Pipeline Build Step Plugin

Publication date: 2026-09-02

Last updated on: 2026-09-02

Assigner: Jenkins Project

Description
A missing permission check in Jenkins Pipeline: Build Step Plugin 599.v4b_67ea_11b_152 and earlier causes downstream builds awaited by the `waitForBuild` step when the `propagateAbort` parameter is used to be canceled even when the build's authentication lacks Item/Cancel permission on the downstream job.

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Meta Information

Published
2026-09-02
Last Modified
2026-09-02
Generated
2026-09-05
AI Q&A
2026-09-02
EPSS Evaluated
2026-09-03
NVD
CVE-2026-84661
EUVD
EUVD-2026-70127

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
jenkinsci build_step_plugin to 599.v4b_67ea_11b_152 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

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Executive Summary

This vulnerability is a missing permission check in Jenkins Pipeline: Build Step Plugin. It allows downstream builds to be canceled even when the user's authentication lacks the required Item/Cancel permission on the downstream job, specifically when using the waitForBuild step with the propagateAbort parameter.

Detection Guidance

This vulnerability involves Jenkins Pipeline: Build Step Plugin where a missing permission check allows unauthorized cancellation of downstream builds. To detect it, check if the plugin version is 599.v4b_67ea_11b_152 or earlier. Use Jenkins CLI or script console to list installed plugins and versions.

Impact Analysis

This vulnerability could allow unauthorized users to cancel builds they should not have permission to stop. This may disrupt CI/CD pipelines, cause unexpected build failures, or lead to incorrect build status reporting.

Compliance Impact

This vulnerability does not directly impact GDPR or HIPAA compliance as it involves a Jenkins plugin permission issue rather than data exposure or privacy violations. However, unauthorized job cancellations could disrupt workflows, potentially affecting audit trails or operational integrity in regulated environments.

Mitigation Strategies

Update Jenkins Pipeline: Build Step Plugin to version 599.v4b_67ea_11b_152 or later to address the missing permission check issue.

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