SB2026060818 - Command injection in FileBrowser

Description

This security bulletin contains information about 1 vulnerability.

1) Command injection (CVE-ID: N/A)

CWE-ID: CWE-77 - Command injection

CVSSv4: 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/E:U/U:Green

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.

Remediation

Install update from vendor's website.

References

• https://github.com/filebrowser/filebrowser/security/advisories/GHSA-8c9q-7855-wfxq
• https://github.com/filebrowser/filebrowser/issues/5199