Configuration Overwrite Risk in Jenkins GitLab Plugin by Jenkins
CVE-2026-84664

5.4MEDIUM

Key Information:

Vendor

Jenkins
Status
Jenkins Gitlab Plugin
Vendor
CVE Published:
2 September 2026

What is CVE-2026-84664?

The Jenkins GitLab Plugin versions 1.9.16 and earlier are susceptible to a vulnerability that allows attackers to overwrite the global GitLab connection configuration. This could enable unauthorized access through the use of valid GitLab API tokens that were previously configured by administrators. Attackers can leverage this flaw to connect to malicious URLs, resulting in potential data exposure and further compromising system integrity. For more details, visit the Jenkins Security Advisory.

Affected Version(s)

Jenkins GitLab Plugin 0 <= 1.9.16

References

https://www.jenkins.io/security/advisory/2026-09-02/#SECU...
vendor-advisory

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.