CVE-2026-2130 Overview
A command injection vulnerability has been identified in BurtTheCoder mcp-maigret versions up to 1.0.12. The vulnerability exists within the search_username component in the src/index.ts file. By manipulating the Username argument, an attacker can inject arbitrary commands that will be executed by the underlying system. This vulnerability can be exploited remotely by authenticated users, potentially leading to unauthorized command execution on the target system.
Critical Impact
Remote attackers with low privileges can exploit this command injection vulnerability to execute arbitrary system commands, potentially compromising the confidentiality, integrity, and availability of the affected system.
Affected Products
- BurtTheCoder mcp-maigret versions up to 1.0.12
Discovery Timeline
- February 8, 2026 - CVE-2026-2130 published to NVD
- February 9, 2026 - Last updated in NVD database
Technical Details for CVE-2026-2130
Vulnerability Analysis
This command injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) occurs due to insufficient input validation in the search_username functionality of the mcp-maigret application. The vulnerability allows user-supplied input in the Username parameter to be passed directly to system commands without proper sanitization.
When a user provides a crafted username containing shell metacharacters or command separators, these special characters are interpreted by the underlying shell, allowing arbitrary command execution. The network-accessible nature of this vulnerability means attackers can exploit it remotely, though authentication is required.
Root Cause
The root cause of this vulnerability lies in the improper handling of user input in the src/index.ts file. The Username parameter passed to the search_username component is not adequately sanitized before being used in command execution contexts. This failure to neutralize special elements allows injection of malicious commands through the Username argument.
Attack Vector
The attack can be launched remotely over the network. An attacker with low-level privileges can craft a malicious Username value containing command injection payloads such as shell metacharacters (;, |, &&, ||, backticks, or $() command substitution). When the application processes this input without proper validation, the injected commands are executed with the privileges of the application process.
For example, an attacker might submit a username like testuser; whoami or testuser$(cat /etc/passwd) to execute arbitrary commands on the server. The vulnerability requires no user interaction beyond the initial malicious request.
The vulnerability mechanism involves unsanitized user input being passed to system command execution functions. For detailed technical analysis, refer to the GitHub Issue Discussion and the security patch commit.
Detection Methods for CVE-2026-2130
Indicators of Compromise
- Unusual command execution patterns originating from the mcp-maigret application process
- Log entries showing usernames containing shell metacharacters such as ;, |, &&, $(), or backticks
- Unexpected child processes spawned by the Node.js application running mcp-maigret
- Network traffic containing suspicious username parameters with encoded or special characters
Detection Strategies
- Implement application-level logging to capture all username search requests and flag inputs containing shell metacharacters
- Deploy Web Application Firewall (WAF) rules to detect and block command injection patterns in HTTP parameters
- Monitor process creation events for unexpected commands spawned by the mcp-maigret application
- Utilize SentinelOne's behavioral AI to detect anomalous command execution patterns indicative of injection attacks
Monitoring Recommendations
- Enable verbose logging in the mcp-maigret application to capture all incoming search requests
- Configure SIEM rules to alert on command injection patterns in application logs
- Monitor system call activity for the application process to detect unauthorized command execution
- Implement real-time alerting for any process spawned by Node.js that executes shell commands
How to Mitigate CVE-2026-2130
Immediate Actions Required
- Upgrade mcp-maigret to version 1.0.13 or later immediately
- Review application logs for any signs of exploitation attempts
- Implement input validation at the network perimeter as an additional defense layer
- Audit any systems running affected versions for signs of compromise
Patch Information
The vulnerability has been addressed in mcp-maigret version 1.0.13. The fix is available in commit b1ae073c4b3e789ab8de36dc6ca8111ae9399e7a. Organizations should upgrade to the patched version as soon as possible. The updated release is available on the GitHub Release Page.
Workarounds
- If immediate patching is not possible, implement strict input validation on the Username parameter to reject special characters
- Deploy a WAF rule to sanitize or block requests containing shell metacharacters in username fields
- Consider temporarily disabling the search_username functionality until the patch can be applied
- Restrict network access to the mcp-maigret service to trusted IP addresses only
# Example: Update mcp-maigret to patched version
npm update mcp-maigret@1.0.13
# Or install specific version
npm install mcp-maigret@1.0.13
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
