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CVE-2026-84651

medium CVSS 6.3 EPSS 0.3%

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.

Versions it affects

Software versions checked with the free lookup that CVE-2026-84651 applies to, and the release that fixes it where the sources name one.

Jenkins 1.509 fixed in 2.580

At a glance

Severity
Medium
CVSS base score
6.3 out of 10
Known exploited
Not in CISA's catalogue of exploited vulnerabilities
EPSS
0.3% probability of exploitation in the next 30 days, higher than 21% of scored vulnerabilities
Weakness
CWE-284
Published
2026-09-02
NVD CVE.org

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