CVE-2026-84645
Received Received - Intake

Remote Code Execution in Jenkins via Stapler Request Handling

Publication date: 2026-09-02

Last updated on: 2026-09-02

Assigner: Jenkins Project

Description
In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, objects of types marked as storing their configuration in independent top-level configuration files in Jenkins (such as the global configuration and jobs) can appear as nested field values in user-submitted `config.xml` documents and subsequently handle HTTP requests via Stapler, resulting in 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-2026-84645
EUVD
EUVD-2026-70111

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
jenkins jenkins 2.579
jenkins jenkins 2.568.2
jenkins jenkins 2.580
jenkins jenkins 2.568.3

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

CVE-2026-84645 is a deserialization vulnerability in Jenkins where user-submitted config.xml files could embed serialized objects marked for independent configuration storage. When processed via Stapler's HTTP request handling, this allowed attackers to access the Script Console and execute remote code.

Detection Guidance

Check Jenkins version with 'java -jar jenkins.war --version' or via the web UI at /systemInfo. If running 2.579 or earlier (LTS 2.568.2 or earlier), the system is vulnerable. Inspect config.xml files for suspicious nested objects or deserialization patterns.

Impact Analysis

An attacker could exploit this to gain remote code execution on a Jenkins server, potentially taking control of the system, accessing sensitive data, or disrupting operations. This requires user-submitted config.xml files to be processed by the vulnerable Jenkins version.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR (data protection) and HIPAA (health data privacy) requirements. Organizations using vulnerable Jenkins versions may face compliance violations and legal consequences.

Mitigation Strategies

Upgrade Jenkins to version 2.580 or later (LTS 2.568.3 or later) immediately. Disable user-submitted config.xml processing if possible and review Script Console access logs for unauthorized activity.

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