CVE-2026-84664: Jenkins Project Jenkins GitLab Plugin

Medium severity, CVSS 5.4. EPSS: 0.1% chance of exploitation in the next 30 days.

Jenkins GitLab Plugin 1.9.16 and earlier allows overwriting the global GitLab connection configuration through Stapler data binding, allowing attackers to connect to an attacker-specified URL using GitLab API tokens already configured by administrators.

Affected products

• Jenkins Project Jenkins GitLab Plugin: up to and including 1.9.16

Published 2026-09-02. Last modified 2026-09-03.