What is CVE-2026-84670?

CVE-2026-84670 is a high-severity vulnerability in Jenkins Project Performance Plugin, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-09-02.

How severe is CVE-2026-84670?

High severity. CVSS v3 base score is 8.8 out of 10.

Deserialization in Jenkins Project Performance Plugin

CVE-2026-84670

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.

Vulnerability class: Insecure Deserialization

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Jenkins Project Performance Plugin

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

jenkinsci-cert@googlegroups.com (vendor-advisory)

Frequently asked questions

What is CVE-2026-84670?: CVE-2026-84670 is a high-severity vulnerability in Jenkins Project Performance Plugin, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-09-02.
How severe is CVE-2026-84670?: High severity. CVSS v3 base score is 8.8 out of 10.