Jenkins GitHub Plugin XSS via URL Processing in 1.46.0 and earlier
CVE-2026-42523 Published on April 29, 2026
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.
Vulnerability Analysis
CVE-2026-42523 can be exploited with network access, requires user interaction and a small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-42523 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-42523
Want to know whenever a new CVE is published for Jenkins? stack.watch will email you.
Affected Versions
Jenkins Project Jenkins GitHub Plugin:- Before and including 1.46.0 is affected.