---
id: "CVE-2026-104080"
kind: "vulnerability"
aliases: ["CVE-2026-104080"]
title: "Control Web Panel: unauthenticated shell injection grants root command execution"
severity: "high"
cvss: 8.6
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["control-web-panel", "infrastructure", "linux", "self-hosted", "web-hosting"]
not_affected_if: ["cwp-1.30-or-later"]
published_at: "2026-11-02T16:17:22+00:00"
first_seen_at: "2026-11-02T16:24:03+00:00"
updated_at: "2026-11-02T16:26:23+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-104080", "first_seen_at": "2026-11-02T16:24:03+00:00"}]
---

# Control Web Panel: unauthenticated shell injection grants root command execution

Control Web Panel (CWP) before webpanel_version 1.30 passes the 'user' parameter of its loopback /valid_token/ API route unescaped into a shell call. An unauthenticated attacker who can reach that route can inject shell metacharacters and run arbitrary commands as root.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed CWP version against `webpanel_version` in the panel's version file; versions below 1.30 are affected per the sources.
- Confirm whether the panel's loopback API route `/valid_token/` is reachable from outside the host, such as through a proxy or forwarded port.

## Fix

- Move Control Web Panel to `webpanel_version` 1.30 or later, as stated by the sources.

## Timeline

- 2026-11-02T16:24:03+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-104080

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/control-web-panel-cwp-os-command-injection-via-valid-token

## From the sources

Control Web Panel (CWP) before webpanel_version 1.30 contains an OS command injection vulnerability in the loopback API /valid_token/ route that allows unauthenticated attackers to execute arbitrary commands as root by injecting shell metacharacters into the unvalidated 'user' parameter. Attackers can send a crafted request to the /valid_token/ route, which passes the parameter unescaped into a shell_exec() call.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_