Missing Authorization in GitHub Branch Source - CVE-2026-42522
Published: May 4, 2026
Vulnerability identifier: #VU129267
CSH Severity: Medium
CVSS v4: 5.3 [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]
CVE-ID: CVE-2026-42522
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
GitHub Branch Source
How to mitigate CVE-2026-42522
Install updates from vendor's website.
GitHub Branch Source - update to 1967.1969.v205fd594c821