Is CVE-2026-84670 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-84670?

CVE-2026-84670 has a CVSS v3 severity of HIGH (8.8).

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CVE-2026-84670

Description

Jenkins Performance Plugin 1015.v09ca_52b_3370e and earlier does not restrict the classes that can be instantiated when deserializing cached performance reports stored in the build directory on the Jenkins controller, allowing attackers with Item/Configure permission to execute arbitrary code on the Jenkins controller.