Improper Resolution of Path Equivalence in FileBrowser - #VU139760
Published: July 27, 2026
Vulnerability identifier: #VU139760
CSH Severity: Low
CVSS v4: 7.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-41
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass administrator-defined access rules and disclose or modify files within their own scope.
The vulnerability exists due to improper resolution of path equivalence in the access rule checker when processing case-variant paths and Windows-separator paths. A remote user can request a specially crafted path to bypass administrator-defined access rules and disclose or modify files within their own scope.
This affects case-insensitive filesystems and Windows path handling, and does not grant access outside the user's assigned scope.
Affected software
FileBrowser
Remediation
Install security update from vendor's website.
FileBrowser - update to 2.63.21