CVE-2026-84673

Jenkins Customizable Header Plugin 295.v2544b_ca_19b_97 and earlier allows overwriting the plugin's appearance configuration through Stapler data binding, allowing attackers to configure a custom SVG icon containing inline JavaScript, resulting in a stored cross-site scripting (XSS) vulnerability.

Score

CVSS 3.1 8.8 High

Status

Awaiting Analysis - jenkinsci-cert@googlegroups.com

Published

2026-09-02

Last modified

2026-09-02

Weaknesses

CWE-79

Affected products

• Jenkins Customizable Header Plugin (Jenkins Project)

References

• https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-4104