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6.3 Medium

CVE-2026-84651 In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, the REST API and CLI endpoints for updating agent configuration…

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.

Affected products and versions

Product Affected versions Fixed in
Jenkins 2.580 earliest → < 2.580 2.580
Jenkins 2.568 earliest → < 2.568.3 2.568.3

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