Incorrect authorization in FileBrowser - #VU139756
Published: July 27, 2026
Vulnerability identifier: #VU139756
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in the /api/resources endpoint checksum branch when handling checksum requests for readable files. A remote user can send a specially crafted GET request with the checksum parameter to disclose sensitive information.
The issue bypasses only the Download permission check and returns a file digest rather than plaintext content. It does not bypass scope or path authorization.
Affected software
FileBrowser
Remediation
Install security update from vendor's website.
FileBrowser - update to 2.63.19