CVE-2026-54090: Filebrowser

High severity, CVSS 8.7. EPSS: 0.4% chance of exploitation in the next 30 days.

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.33.8, when a shell interpreter is configured (e.g. /bin/sh -c), the command allowlist can be bypassed through shell metacharacters. The allowlist validates only the first token of user input, but the entire raw string is handed to the shell — semicolons, pipes, backticks, and $() all work to chain arbitrary commands after a permitted one. This vulnerability is fixed in 2.33.8.

Affected products

• Filebrowser Filebrowser: before 2.33.8 (fixed in 2.33.8)

Published 2026-06-25. Last modified 2026-06-26.