CVE-2026-54090Public exploitNetwork attack vector

Authenticated command execution via shell metacharacters

Published Jun 25, 2026 · Updated Jun 25, 2026

Command injection in File Browser before 2.33.8 allows remote authenticated users to execute arbitrary OS commands through its command API. ParseCommand checks only the first token against the user's allowlist, then commandsHandler passes the complete raw input, including shell metacharacters, to the configured shell. Command execution must be enabled, a shell such as /bin/sh -c must be configured, and the account must have Execute permission plus at least one allowed command; successful exploitation runs commands with the server process's privileges.

CVSS severity8.7
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Command injection in File Browser before 2.33.8 allows remote authenticated users to execute arbitrary OS commands through its command API. ParseCommand checks only the first token against the user's allowlist, then commandsHandler passes the complete raw input, including shell metacharacters, to the configured shell. Command execution must be enabled, a shell such as /bin/sh -c must be configured, and the account must have Execute permission plus at least one allowed command; successful exploitation runs commands with the server process's privileges.

The record

CVE
CVE-2026-54090
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
File Browser Contributors
Product
File Browser
Classifications
CWE-184, CWE-77, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.33.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

File Browser Contributors · File Browserversion=< 2.33.8

Published CVSS scores

8.7GitHub, Inc.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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-184Incomplete List of Disallowed Inputs
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo