Command Injection in Guardian Language-System

Executive Summary

CVE-2026-34116 is an unauthenticated OS command injection vulnerability in the Guardian Language-System's transcribe.php file. The vulnerability arises because the 'id' GET parameter is passed directly into a PHP exec() call without any sanitization or validation. This allows a remote attacker to append shell metacharacters to the 'id' parameter and execute arbitrary operating system commands on the server.

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Detection Guidance

This vulnerability can be detected by testing the 'id' GET parameter in the transcribe.php endpoint for command injection. Since the parameter is passed directly to a PHP exec() call without sanitization, injecting shell metacharacters can reveal if arbitrary commands are executed.

A common detection method is to send crafted HTTP requests to the vulnerable endpoint with payloads that include shell metacharacters and observe the server's response or behavior.

• Use curl or similar tools to send requests with injected commands, for example: curl "http://target/transcribe.php?id=1;id"
• Check for command execution results in the response, such as output from the 'id' command or other injected commands.
• Monitor server logs for unusual command execution or errors triggered by injected payloads.

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Impact Analysis

This vulnerability can have severe impacts as it allows an unauthenticated remote attacker to execute arbitrary OS commands on the affected server. This can lead to full system compromise, unauthorized data access, data modification or deletion, disruption of services, and potentially the attacker gaining persistent control over the system.

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Compliance Impact

The provided information does not specify how this vulnerability impacts compliance with common standards and regulations such as GDPR or HIPAA.

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Mitigation Strategies

The vulnerability exists because the 'id' GET parameter is passed directly into a PHP exec() call without sanitization, allowing unauthenticated remote attackers to execute arbitrary OS commands.

Immediate mitigation steps include restricting access to the vulnerable transcribe.php file, applying input validation or sanitization on the 'id' parameter to prevent shell metacharacter injection, and updating or patching the Guardian Language-System to a version that fixes this issue.

Since no authentication is required to exploit this vulnerability, it is critical to address it promptly to prevent remote code execution.

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