Vulnerability in Jenkins Project GitLab Plugin

CVE-2026-84664

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.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-84664?
CVE-2026-84664 is a medium-severity vulnerability in Jenkins Project GitLab Plugin, classified under Modification of Assumed-Immutable Data (MAID). CVSS score: 5.4/10. Published 2026-09-02.
How severe is CVE-2026-84664?
Medium severity. CVSS v3 base score is 5.4 out of 10.