SB20260727345 - Improper Resolution of Path Equivalence in FileBrowser

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Resolution of Path Equivalence (CVE-ID: N/A)

CWE-ID: CWE-41 - Improper Resolution of Path Equivalence

CVSSv4: 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]

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.

Remediation

Install update from vendor's website.

References

• https://github.com/filebrowser/filebrowser/security/advisories/GHSA-fgm5-pw99-w2p7
• https://github.com/filebrowser/filebrowser/pull/6045