Vulnerability · Published Apr 29, 2026 · Assigned by jenkins

CVE-2026-42523

Critical 9.0

In plain English

A critical-severity cross-site scripting in Jenkins GitHub Plugin from Jenkins Project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.0Critical

Exploit odds (30 days)0.3%top 79.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Jenkins GitHub Plugin 1.46.0 and earlier improperly processes the current job URL as part of JavaScript implementing validation of the feature "GitHub hook trigger for GITScm polling", resulting in a stored cross-site scripting (XSS) vulnerability exploitable by non-anonymous attackers with Overall/Read permission.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Maven	com.coravy.hudson.plugins.github:github	1.46.0.1	GHSA-w22p-4x9f-486v

Affected products (as reported)

Vendor	Product	Versions
Jenkins Project	Jenkins GitHub Plugin	0 – through 1.46.0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

References

Jenkins Security Advisory 2026-04-29 vendor-advisory