CVE-2026-42523: Vulnerability in Jenkins Project Jenkins GitHub Plugin
A stored cross-site scripting (XSS) vulnerability exists in Jenkins GitHub Plugin versions 1.46.0 and earlier. The vulnerability arises from improper processing of the current job URL in JavaScript validation for the "GitHub hook trigger for GITScm polling" feature. This flaw allows non-anonymous users with Overall/Read permission to exploit the vulnerability. The issue is resolved starting from version 1.46.0.1, which no longer processes the current job URL in the vulnerable JavaScript code.
AI Analysis
Technical Summary
CVE-2026-42523 is a stored XSS vulnerability in Jenkins GitHub Plugin versions up to and including 1.46.0. The vulnerability is due to improper handling of the current job URL in JavaScript validation for the "GitHub hook trigger for GITScm polling" feature, enabling attackers with Overall/Read permissions to inject malicious scripts. The vulnerability is fixed in version 1.46.0.1 by removing the processing of the current job URL in the validation JavaScript.
Potential Impact
Successful exploitation can lead to stored cross-site scripting attacks, potentially allowing attackers to execute arbitrary scripts in the context of the Jenkins web interface. This can compromise confidentiality, integrity, and availability of the Jenkins environment. The CVSS score of 9.0 reflects a critical severity with network attack vector, low attack complexity, required privileges, user interaction, and complete impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade the Jenkins GitHub Plugin to version 1.46.0.1 or later, where the vulnerability is fixed by removing the processing of the current job URL in the JavaScript validation. No other mitigation or workaround is indicated in the available data.
CVE-2026-42523: Vulnerability in Jenkins Project Jenkins GitHub Plugin
Description
A stored cross-site scripting (XSS) vulnerability exists in Jenkins GitHub Plugin versions 1.46.0 and earlier. The vulnerability arises from improper processing of the current job URL in JavaScript validation for the "GitHub hook trigger for GITScm polling" feature. This flaw allows non-anonymous users with Overall/Read permission to exploit the vulnerability. The issue is resolved starting from version 1.46.0.1, which no longer processes the current job URL in the vulnerable JavaScript code.
CVSS v3.1
Score 9.0critical
Affected software
Jenkins Project
Jenkins GitHub Plugin
pkg:github/jenkinsci/github-pluginRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-42523 is a stored XSS vulnerability in Jenkins GitHub Plugin versions up to and including 1.46.0. The vulnerability is due to improper handling of the current job URL in JavaScript validation for the "GitHub hook trigger for GITScm polling" feature, enabling attackers with Overall/Read permissions to inject malicious scripts. The vulnerability is fixed in version 1.46.0.1 by removing the processing of the current job URL in the validation JavaScript.
Potential Impact
Successful exploitation can lead to stored cross-site scripting attacks, potentially allowing attackers to execute arbitrary scripts in the context of the Jenkins web interface. This can compromise confidentiality, integrity, and availability of the Jenkins environment. The CVSS score of 9.0 reflects a critical severity with network attack vector, low attack complexity, required privileges, user interaction, and complete impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade the Jenkins GitHub Plugin to version 1.46.0.1 or later, where the vulnerability is fixed by removing the processing of the current job URL in the JavaScript validation. No other mitigation or workaround is indicated in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- jenkins
- Date Reserved
- 2026-04-28T09:24:35.048Z
- State
- PUBLISHED
Threat ID: 69f20cdfcbff5d8610181a8a
Added to database: 04/29/2026, 13:51:27 UTC
Last enriched: 08/15/2026, 17:17:10 UTC
Last updated: 09/13/2026, 14:30:08 UTC
Views: 221
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