CVE-2026-34116 in language-system
Summary
by MITRE • 07/01/2026
Guardian language-system passes the id GET parameter directly into a PHP exec() call in transcribe.php (line 15) without sanitization: exec(\"php jobs/transcribe.php \".$login_session.\" \".$_GET['id'].\" ...\"). No authentication is required. An unauthenticated remote attacker can append shell metacharacters to execute arbitrary OS commands on the server.
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Analysis
by VulDB Data Team • 07/01/2026
This vulnerability represents a critical command injection flaw in the guardian language-system where user input from the id GET parameter is directly concatenated into a PHP exec() function call without any sanitization or validation. The specific location at line 15 in transcribe.php demonstrates a classic insecure coding pattern that violates fundamental security principles and creates an immediate remote code execution vector. The vulnerability occurs within the jobs/transcribe.php script where the login_session variable and the unsanitized $_GET['id'] parameter are passed directly to the exec() function, creating a dangerous command construction scenario.
The technical implementation of this flaw stems from improper input handling and lack of proper parameter validation mechanisms. When an attacker crafts a malicious GET request containing shell metacharacters such as semicolons, pipes, or backticks within the id parameter, these characters are interpreted by the underlying operating system rather than being treated as literal string data. This behavior aligns with CWE-78, which specifically addresses improper neutralization of special elements used in OS commands, and represents a direct violation of secure coding practices for command execution. The absence of authentication requirements makes this vulnerability particularly dangerous as it allows any remote attacker to exploit the system without prior authorization.
The operational impact of this vulnerability extends far beyond simple command injection, creating an environment where attackers can execute arbitrary operating system commands with the privileges of the web server process. This could potentially lead to complete system compromise, data exfiltration, or further lateral movement within the network infrastructure. The vulnerability affects not only the immediate transcribe functionality but could enable attackers to access sensitive files, establish persistent backdoors, or use the compromised server as a launch point for attacks against other systems. According to ATT&CK framework, this maps to T1059 Command and Scripting Interpreter with T1059.007 PowerShell and T1059.002 Scripting, although in this case it's direct OS command execution rather than script interpretation.
Mitigation strategies must address both immediate remediation and long-term architectural improvements to prevent similar vulnerabilities. The primary fix involves implementing proper input validation and sanitization of the id parameter before incorporating it into any system command execution context. This can be achieved through parameterized queries, proper escaping of special characters, or complete input rejection for non-numeric identifiers when they are expected to be numeric. Additionally, the system should implement proper authentication mechanisms and privilege separation to ensure that even if such vulnerabilities exist, their exploitation impact remains limited. The remediation process should also include implementing proper logging and monitoring of command execution activities to detect potential abuse attempts and establish defense-in-depth measures against similar future vulnerabilities.