CVE-2026-84673

8.8 highEPSS 0.6%

High (8.8). EPSS 0.6% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

8.8 high

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 47% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-09-02
Modified: 2026-09-03
Record from: the NVD, synced 2026-10-19

References

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

Check your stack JSON