CVE-2026-84673

HighCVSS 8.8/10Last modified Sep 3, 2026

Description

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.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-79

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
Jenkins Project	Jenkins Customizable Header Plugin	<= 295.v2544b_ca_19b_97

References

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

Timeline

Published: Sep 2, 2026
Last modified: Sep 3, 2026
NVD status: Awaiting Analysis

Related CVEs from 2026

CVE-2026-846745.4Missing permission checks in Jenkins XebiaLabs XL Deploy Plugin 26.1.0 and earlier allow attackers with Overall/Read permission to enumerate CVE-2026-846757.4OS command injection vulnerability in Jenkins TICS Plugin 2025.1.1 and earlier allows attackers able to control build environment variable v CVE-2026-846764.3Jenkins Parameterized Remote Trigger Plugin 3.2.2 and earlier stores tokens unencrypted in job config.xml files on the Jenkins controller wh CVE-2026-846775.4Jenkins update-center2 3.18.3 and earlier does not escape plugin-provided values (plugin names, descriptions, and version metadata) on plugi CVE-2026-84688.2Allocation of Resources Without Limits or Throttling vulnerability in plug_project plug allows denial of service via unbounded buffer accumu CVE-2026-846827.7A command injection vulnerability exists in the TDDPv2 service (/usr/bin/tddp) on Archer AX90 V1. An unauthenticated adjacent-network attack CVE-2026-846838.7A flaw was found in Red Hat Ansible Automation Platform's automation- controller. The HTML view of job, ad hoc command, project update, and CVE-2026-846856.5The react-native-auth0 SDK's web platform implementation does not scope its in-memory token cache to individual user sessions when operating CVE-2026-84698.2Allocation of Resources Without Limits or Throttling vulnerability in phenixdigital phoenix_storybook allows unauthenticated denial-of-servi CVE-2026-846918.7A flaw was found in Red Hat Ansible Automation Platform's automation- controller. The setting that formats the log message emitted for API 4 CVE-2026-846948.8Coolify before 4.2.0 fails to properly escape environment variable key names in Docker commands executed over SSH on managed servers. Authen CVE-2026-846958.7BookStack before 26.05.4 contains a stored cross-site scripting vulnerability in the drawing upload endpoint that accepts unvalidated base64