Incorrect authorization in FileBrowser - CVE-2026-54091
Published: June 8, 2026
Vulnerability identifier: #VU133486
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-54091
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper access control in public share handlers when processing requests for files and subdirectories beneath a shared directory using rebased relative paths. A remote attacker can request a specially crafted public share path to disclose sensitive information.
No authenticated session is required if the public share is not password protected.
Affected software
FileBrowser
How to mitigate CVE-2026-54091
Install security update from vendor's website.
FileBrowser - update to 2.63.6