CVE-2026-84651
Received Received - Intake

Jenkins Agent Configuration Takeover via XML Overwrite

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, the REST API and CLI endpoints for updating agent configuration do not prevent a submitted configuration from overwriting a different agent by specifying that agent's name in the submitted XML document, allowing attackers with Agent/Configure permission on one agent to take over a different agent, gaining control of its configuration and obtaining access to its inbound agent secret and environment variables.

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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-2026-84651
EUVD
EUVD-2026-70117

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
jenkins jenkins to 2.580 (exc)
jenkins jenkins_lts to 2.569 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in Jenkins allows an attacker with Agent/Configure permission on one agent to overwrite the configuration of a different agent by submitting a modified XML document. This can lead to unauthorized control over another agent's settings, exposing its secrets and environment variables.

Impact Analysis

If exploited, this vulnerability could allow attackers to gain control of Jenkins agents, access sensitive data like inbound agent secrets and environment variables, and potentially escalate privileges within the Jenkins environment.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by allowing unauthorized access to agent configurations and secrets. Attackers gaining control of agent configurations may expose sensitive environment variables or inbound agent secrets, which could include personal data or protected health information. This unauthorized access may violate data protection requirements under GDPR and HIPAA if such data is compromised.

Mitigation Strategies

Update Jenkins to a version later than 2.579 or LTS 2.568.2 to patch the vulnerability. Restrict Agent/Configure permissions to trusted users only.

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