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CVE-2026-42523 - Vulnerability Analysis

CriticalCVSS: 9.0

Last Updated: April 29, 2026

Jenkins GitHub Plugin - Stored XSS

Published: April 29, 2026Updated: April 29, 2026Remote Exploitable

Overview

Jenkins GitHub Plugin <= 1.46.0 contains a stored XSS caused by improper processing of the current job URL in JavaScript validation for GitHub hook trigger, letting non-anonymous attackers with Overall/Read permission execute scripts.

Severity & Score

Severity: Critical

CVSS Score: 9.0

Impact

Non-anonymous attackers with read permission can execute arbitrary scripts, potentially leading to session hijacking or further attacks.

Mitigation

Update to a version later than 1.46.0.

References

https://www.jenkins.io/security/advisory/2026-04-29/#SECURITY-3704

Related Resources

Vulnerability Intelligence Dashboard
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Details

CVE ID: CVE-2026-42523
Severity: Critical
CVSS Score: 9.0
Type: stored_xss
Status: new

CWE

CWE-79

CVSS Metrics

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