CVE-2026-54090CWE-184CWE-77

File Browser: Command Allowlist Bypass via Shell Metacharacter Injection

High · published June 25, 2026

CVSS v4.0
8.7
EPSS
0%
Percentile
36.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
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
EPSS
0.00437 · 36.9th percentile
Weaknesses
CWE-184 · Incomplete List of Disallowed Inputs; CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')
Published
2026-06-25T17:51Z
EPSS history
Timeline
  • 25 JUN 17:51Z
    File Browser: Command Allowlist Bypass via Shell Metacharacter Injection
    cvelistv5