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CVE-2026-42523 — Vulnerability in...

CRITICAL

Jenkins GitHub Plugin has an XSS vulnerability

Published April 29, 2026Updated August 14, 2026Source: osv

Summary

In Jenkins GitHub Plugin versions 1.46.0 and earlier, the JavaScript that validates the "GitHub hook trigger for GITScm polling" feature improperly processes the current job URL. This results in a stored cross-site scripting (XSS) vulnerability exploitable by non-anonymous attackers with Overall/Read permission. GitHub Plugin 1.46.0.1 no longer processes the current job URL as part of JavaScript implementing validation of the feature "GitHub hook trigger for GITScm polling".

Advisory Timeline

  • First published April 29, 2026 (166 days ago).
  • Last revised August 14, 2026 — 107 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Maven
Update com.coravy.hudson.plugins.github:github to 1.46.0.1 or later
<!-- Update pom.xml dependency version to 1.46.0.1 for com.coravy.hudson.plugins.github:github -->

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: maven (1).

PackageEcosystemAffectedFixed In
com.coravy.hudson.plugins.github:github
maven
0.1, 0.2, 0.3, 0.4 (+101 more)1.46.0.1

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-79
    Cross-site Scripting (XSS)MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.0 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

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

References

Frequently Asked Questions

What is CVE-2026-42523?
Jenkins GitHub Plugin has an XSS vulnerability This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.0/10).
How do I check if my project is affected by CVE-2026-42523?
CVE-2026-42523 affects com.coravy.hudson.plugins.github:github. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-42523 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.0

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-w22p-4x9f-486v

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