Vulnerability DatabaseCVE-2026-84673
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CVE-2026-84673
Published:September 02, 2026
Updated:September 22, 2026
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.
Affected Packages
https://github.com/jenkinsci/customizable-header-plugin.git (GITHUB):
Affected version(s) >=10.vb_a_4dc40fd7ea_ <330.v8a_8d87511ea_1
Fix Suggestion:
Update to version 330.v8a_8d87511ea_1
Related Resources (1)
https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-4104
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-79
EPSS
Base Score:
0.29