Command injection in FileBrowser - CVE-2026-54090
Published: June 8, 2026
Vulnerability identifier: #VU133476
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-54090
CWE-ID: CWE-77
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary os commands.
The vulnerability exists due to improper neutralization of special elements in runner/parser.go ParseCommand and http/commands.go commandsHandler when processing user-supplied command input through a configured shell interpreter. A remote user can send a specially crafted command string containing shell metacharacters to execute arbitrary os commands.
Exploitation requires command execution to be enabled, a shell interpreter such as /bin/sh -c to be configured, and the user to have Execute permission with at least one allowed command.
Affected software
FileBrowser
How to mitigate CVE-2026-54090
Install security update from vendor's website.
FileBrowser - update to 2.33.8