CVE-2026-84671
Received Received - Intake

Arbitrary File Write in Jenkins File Parameter Plugin

Publication date: 2026-09-02

Last updated on: 2026-09-02

Assigner: Jenkins Project

Description
Jenkins File Parameter Plugin 425.v3fa_801681b_5e and earlier allows writing files to arbitrary locations on the Jenkins controller file system through Stapler data binding, which can lead to remote code execution.

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Meta Information

Published
2026-09-02
Last Modified
2026-09-02
Generated
2026-09-02
AI Q&A
2026-09-02
EPSS Evaluated
N/A
NVD
CVE-2026-84671
EUVD
EUVD-2026-70143

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
jenkinsci file_parameter_plugin to 425.v3fa_801681b_5e (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

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Executive Summary

The Jenkins File Parameter Plugin before version 425.v3fa_801681b_5e has a vulnerability where Stapler data binding allows writing files to arbitrary locations on the Jenkins controller file system. This flaw can be exploited to achieve remote code execution.

Detection Guidance

To detect this vulnerability, check if the Jenkins File Parameter Plugin version 425.v3fa_801681b_5e or earlier is installed. Use the Jenkins script console to run: println(Jenkins.instance.pluginManager.plugins.findAll { it.shortName == 'file-parameter' }.version). If the version is 425.v3fa_801681b_5e or lower, the system is vulnerable.

Impact Analysis

An attacker could exploit this to write malicious files to the Jenkins controller, potentially leading to full system compromise, unauthorized access, or execution of arbitrary code on the server.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR's data protection requirements or HIPAA's security rules for protected health information. Compliance may be compromised if systems are exploited.

Mitigation Strategies

Update Jenkins File Parameter Plugin to the latest version immediately to remove the vulnerability. Disable the plugin if not in use and restrict access to Jenkins controller file system permissions.

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