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CVE-2026-84651 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:6.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-4025	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-284	Improper Access Control	CISA-ADP

Affected Products

Product	Versions
jenkins jenkins	< 2.568.3 < 2.580
CPE cpe:2.3:a:jenkins:jenkins:::::lts:::* cpe:2.3:a:jenkins:jenkins:::::-:::* Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Sep 11, 2026	Initial Analysis	[email protected]
Sep 2, 2026	CVE Modified	CISA-ADP
Sep 2, 2026	New CVE Received	[email protected]