CVE-2026-6130 Overview
A command injection vulnerability has been identified in ChatboxAI Chatbox versions up to 1.20.0. The flaw exists in the StdioClientTransport function within the file src/main/mcp/ipc-stdio-transport.ts, which is part of the Model Context Protocol (MCP) Server Management System. An attacker can exploit this vulnerability by manipulating the args or env arguments, leading to arbitrary OS command injection. The vulnerability can be exploited remotely, and exploit details have been publicly disclosed.
Critical Impact
Remote attackers can execute arbitrary operating system commands on affected systems by injecting malicious payloads through the args/env parameters in the MCP server transport layer.
Affected Products
- ChatboxAI Chatbox versions up to and including 1.20.0
- Systems utilizing the Model Context Protocol Server Management component
- Deployments with the StdioClientTransport function exposed to untrusted input
Discovery Timeline
- April 12, 2026 - CVE-2026-6130 published to NVD
- April 13, 2026 - Last updated in NVD database
Technical Details for CVE-2026-6130
Vulnerability Analysis
This vulnerability is classified as CWE-77 (Improper Neutralization of Special Elements used in a Command). The vulnerable code resides in the StdioClientTransport function within src/main/mcp/ipc-stdio-transport.ts. This component handles inter-process communication for the Model Context Protocol server management functionality.
The vulnerability allows attackers to inject malicious commands through improperly sanitized args and env parameters. When these parameters are processed by the transport layer, insufficient input validation permits shell metacharacters and command separators to be interpreted by the underlying operating system shell. The network-accessible nature of this component means attackers can exploit this remotely without requiring authentication.
The project maintainers were notified about this issue through GitHub Issue Tracker #3627, but have not yet responded to the security report.
Root Cause
The root cause of this vulnerability is insufficient input validation and sanitization in the StdioClientTransport function. When processing the args and env parameters for spawning child processes or executing system commands, the function fails to properly neutralize shell metacharacters, command separators, and other special elements that can alter the intended command execution flow.
Attack Vector
The attack vector is network-based, allowing remote exploitation without authentication. An attacker can craft malicious input containing OS command injection payloads in the args or env parameters when interacting with the MCP Server Management System. The injected commands execute with the privileges of the Chatbox application process.
The vulnerability is triggered when user-controlled data flows into the StdioClientTransport function without proper sanitization, ultimately being passed to a shell execution context where the injected commands are interpreted and executed.
Detection Methods for CVE-2026-6130
Indicators of Compromise
- Unusual child process spawning from the Chatbox application process
- Unexpected network connections originating from Chatbox-related processes
- Command execution logs showing shell metacharacters (;, |, &&, $(), backticks) in MCP-related operations
- Anomalous environment variable modifications or process argument patterns
Detection Strategies
- Monitor process creation events for suspicious child processes spawned by Chatbox or its MCP server components
- Implement application-level logging to capture all arguments passed to the StdioClientTransport function
- Deploy network traffic analysis to detect malformed or malicious MCP protocol requests
- Use endpoint detection and response (EDR) solutions to identify command injection attack patterns
Monitoring Recommendations
- Enable verbose logging for the MCP Server Management System and review logs for injection attempts
- Set up alerts for processes executing with unexpected arguments or environment variables
- Monitor for file system changes or network activity that deviates from normal Chatbox behavior
- Implement security information and event management (SIEM) rules targeting command injection patterns
How to Mitigate CVE-2026-6130
Immediate Actions Required
- Assess your deployment to determine if ChatboxAI Chatbox versions up to 1.20.0 are in use
- Restrict network access to the MCP Server Management System using firewall rules or network segmentation
- Implement input validation at the application perimeter to filter potentially malicious args and env values
- Monitor the official Chatbox GitHub repository for security updates and patches
Patch Information
At the time of publication, the vendor has not responded to the vulnerability report submitted through GitHub Issue #3627. Users should monitor the official repository for security patches and updates. Additional technical details are available through VulDB Vulnerability #356993.
Workarounds
- Disable or restrict access to the MCP Server Management functionality if not required
- Implement network-level access controls to limit who can reach the vulnerable component
- Deploy a web application firewall (WAF) or input filtering proxy to sanitize incoming requests
- Run the Chatbox application with minimal privileges to limit the impact of successful exploitation
# Example: Restrict network access to MCP server component using iptables
# Only allow connections from trusted internal networks
iptables -A INPUT -p tcp --dport <MCP_PORT> -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport <MCP_PORT> -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
