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MEDIUM

CVE-2026-84651

CVSS v3

6.3

MEDIUM

EPSS Score

0.3 %

exploit probability, as of 2026-10-04

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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.

Technical details

Published
2026-09-02
Last Modified
2026-09-02

Frequently asked questions

What is 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 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.

Is CVE-2026-84651 actively exploited?

Active exploitation of CVE-2026-84651 has not been confirmed. Its EPSS score was 0.3% on 2026-10-04, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-84651?

CVE-2026-84651 has a CVSS v3 base score of 6.3 (MEDIUM severity).

Is CVE-2026-84651 affecting your environment?

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