Compliance Impact

The vulnerability allows remote OS command injection leading to full host compromise, including data exposure, integrity loss, and service disruption.

Such impacts on confidentiality, integrity, and availability of data could negatively affect compliance with standards and regulations like GDPR and HIPAA, which require protection of sensitive data and system integrity.

However, no explicit mention of compliance impact or regulatory considerations is provided in the available information.

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Executive Summary

This vulnerability exists in PolarVista xcode-mcp-server version 1.0.0, specifically in the function build_project/run_tests within the src/index.ts file of the MCP Interface component.

The issue arises from the manipulation of the argument Request, which leads to an operating system command injection vulnerability.

This means an attacker can remotely execute arbitrary OS commands on the affected system by exploiting this flaw.

The vulnerability has been publicly disclosed and an exploit is available.

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Impact Analysis

This vulnerability allows a remote attacker to execute arbitrary operating system commands on the affected server.

Such unauthorized command execution can lead to compromise of the system, including data theft, data modification, service disruption, or further attacks within the network.

Because the exploit is publicly available, the risk of exploitation is higher.

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Executive Summary

CVE-2026-7416 is a critical OS command injection vulnerability found in the PolarVista xcode-mcp-server project, specifically in the build_project and run_tests tools. These tools unsafely incorporate user-supplied arguments such as projectPath, scheme, configuration, and destination directly into shell command strings without proper sanitization or neutralization of shell metacharacters.

Because of this unsafe handling, an attacker with network access to the MCP interface can inject arbitrary operating system commands that execute with the privileges of the server process. This means the attacker can run any command on the host system, potentially taking full control.

The vulnerability arises from the use of Node.js's child_process.exec function with user-controlled input, allowing shell metacharacters to be interpreted and executed. No authentication or sandboxing is effectively in place, making exploitation easier.

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Impact Analysis

This vulnerability can have severe impacts including full host compromise. An attacker can execute arbitrary OS commands with the privileges of the server process, which can lead to:

• Exposure of sensitive data on the host system.
• Loss of data integrity by modifying or deleting files.
• Disruption of services running on the host, causing denial of service.

Because the attack can be launched remotely without authentication, any system running the vulnerable version of xcode-mcp-server is at high risk.

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Detection Guidance

This vulnerability can be detected by attempting to exploit the command injection in the vulnerable tools `build_project` and `run_tests` by injecting shell commands through user-supplied arguments such as projectPath, scheme, configuration, or destination.

A proof of concept involves manipulating parameters to execute commands like `id >&2` to verify if arbitrary OS commands can be run.

Detection commands could include sending crafted requests to the MCP interface that include shell metacharacters or command sequences to observe if the server executes them.

Since the vulnerability arises from unsafe use of `child_process.exec` with user input, monitoring for unusual command executions or unexpected process spawning related to these tools may also help detect exploitation attempts.

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Detection Guidance

This vulnerability can be detected by attempting to exploit the command injection in the vulnerable tools `build_project` and `run_tests` of the xcode-mcp-server. Since the vulnerability arises from unsafe interpolation of user-supplied arguments into shell commands, detection involves testing these inputs for command injection.

A proof of concept involves injecting shell metacharacters into parameters such as projectPath, scheme, configuration, or destination to execute arbitrary commands. For example, injecting a command like `id >&2` into the scheme parameter can reveal if command injection is possible.

Detection commands might include sending crafted requests to the MCP interface with payloads that close existing quotes and append commands, then observing the server response or error output for command execution results.

• Use network tools or scripts to send requests to the MCP interface with payloads such as: `scheme=validScheme;id >&2` or `scheme=validScheme && id >&2`.
• Monitor server logs or error outputs for evidence of command execution, such as output from `id` or other injected commands.
• Use static analysis tools or MCP Inspector to analyze the source code for unsafe use of `child_process.exec` with user inputs.

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Mitigation Strategies

Immediate mitigation steps include disabling the vulnerable tools `build_project` and `run_tests` to prevent exploitation.

Avoid executing shell commands with user-supplied input directly. Instead, use safer alternatives such as `execFile` or `spawn` that do not invoke a shell.

Validate all user inputs against strict allowlists to prevent injection of shell metacharacters.

Run the server with the least privileges necessary to limit the impact of a potential compromise.

Apply or develop patches that replace unsafe `exec` calls with safer methods and add regression tests to prevent reintroduction of the vulnerability.

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Mitigation Strategies

Immediate mitigation steps include disabling the vulnerable tools `build_project` and `run_tests` to prevent exploitation.

Avoid executing shell commands with user-supplied input directly. Instead, use safer alternatives such as `execFile` or `spawn` that do not invoke a shell and accept argument arrays.

Validate all user inputs against strict allowlists to ensure only expected values are accepted, preventing injection of shell metacharacters.

Run the server process with the least privileges necessary to limit the impact of any potential exploitation.

Monitor for updates or patches from the project and apply them once available.

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