Missing Authorization in GitHub Branch Source - CVE-2026-42522

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Main Vulnerability Database Vulnerabilities #VU129267

Missing Authorization in GitHub Branch Source - CVE-2026-42522

Published: May 4, 2026


Vulnerability identifier: #VU129267
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-42522
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Jenkins
Affected software:
GitHub Branch Source

Detailed vulnerability description

The vulnerability allows a remote attacker to bypass authorization process.

The vulnerability exists due to incorrect authorization in a method implementing form validation.. A remote user can connect to an attacker-specified URL with attacker-specified GitHub App credentials.


How to mitigate CVE-2026-42522

Install updates from vendor's website.

Sources