CVE-2026-7211: dvladimirov MCP Command Injection RCE Flaw

CVE-2026-7211 Overview

A command injection vulnerability has been identified in dvladimirov MCP up to version 0.1.0. The vulnerability exists within the GitSearchRequest function of the mcp_server.py file in the Git Search API component. Attackers can exploit this weakness by manipulating the repo_url or pattern arguments, allowing arbitrary command execution on the target system. The attack can be executed remotely without authentication, making it particularly dangerous for exposed instances.

Critical Impact

Remote attackers can achieve arbitrary command execution by exploiting insufficient input validation in the Git Search API, potentially leading to complete system compromise.

Affected Products

• dvladimirov MCP up to version 0.1.0
• Systems running the MCP Git Search API component

Discovery Timeline

• 2026-04-28 - CVE-2026-7211 published to NVD
• 2026-04-29 - Last updated in NVD database

Technical Details for CVE-2026-7211

Vulnerability Analysis

This vulnerability is classified as CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), commonly known as injection. The affected component, GitSearchRequest in mcp_server.py, fails to properly sanitize user-supplied input before using it in system command execution contexts.

The vulnerability allows network-based attacks with low complexity and requires no privileges or user interaction. An exploit has been made publicly available, increasing the risk of active exploitation. The project maintainers were notified through an issue report but have not yet responded.

Root Cause

The root cause of this vulnerability is improper input validation and sanitization in the GitSearchRequest function. When processing user-supplied repo_url and pattern parameters, the application constructs system commands without adequately escaping or validating special characters. This allows attackers to inject additional shell commands that will be executed with the privileges of the MCP server process.

Attack Vector

The attack vector is network-based, allowing remote exploitation. An attacker can craft malicious requests to the Git Search API endpoint, embedding shell metacharacters or command sequences within the repo_url or pattern parameters. When the vulnerable function processes these parameters, the injected commands are executed on the underlying operating system.

The vulnerability is exploited by sending specially crafted API requests that contain shell metacharacters (such as ;, |, &&, or backticks) within the repo_url or pattern fields. These malicious payloads bypass input validation and are passed directly to shell command execution contexts, allowing arbitrary command injection. For detailed technical analysis, refer to the VulDB advisory and the GitHub issue discussion.

Detection Methods for CVE-2026-7211

Indicators of Compromise

• Unusual process spawning from the MCP server process, particularly shell processes or unexpected child processes
• HTTP requests to the Git Search API containing shell metacharacters (;, |, &&, `, $()) in the repo_url or pattern parameters
• Unexpected network connections initiated from the MCP server to external hosts
• Log entries showing malformed or suspicious repository URLs or search patterns

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block requests containing shell metacharacters in API parameters
• Monitor application logs for unusual patterns in the repo_url and pattern fields submitted to the Git Search API
• Deploy endpoint detection and response (EDR) solutions to identify anomalous command execution originating from the MCP server process
• Use SentinelOne's behavioral AI to detect command injection attempts and subsequent malicious activity

Monitoring Recommendations

• Enable detailed logging for all Git Search API requests, including full parameter values
• Set up alerts for any shell process execution that originates from the MCP server application
• Monitor for outbound network connections from the server hosting MCP to detect potential reverse shell attempts
• Review access logs regularly for patterns consistent with automated vulnerability scanning or exploitation attempts

How to Mitigate CVE-2026-7211

Immediate Actions Required

• Restrict network access to the MCP Git Search API to trusted IP addresses only
• If not required, disable or remove the Git Search API component entirely
• Implement input validation at the network perimeter using a WAF or reverse proxy
• Monitor the MCP GitHub repository for security updates from the maintainers

Patch Information

As of the last update on 2026-04-29, no official patch has been released by the project maintainers. The project was notified through an issue report but has not responded. Users should monitor the MCP repository for updates and consider implementing the workarounds below until a fix is available.

Workarounds

• Deploy network segmentation to isolate MCP instances from untrusted networks and the public internet
• Implement strict input validation at the application or reverse proxy level to filter shell metacharacters from the repo_url and pattern parameters
• Use a whitelist approach for allowed repository URLs if the functionality cannot be disabled
• Consider deploying the service in a containerized environment with minimal privileges and restricted system access

# Example: Restrict access using iptables
# Allow access only from trusted network
iptables -A INPUT -p tcp --dport 8080 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -j DROP