CVE-2026-34112 in language-system
Summary
by MITRE • 07/01/2026
Guardian language-system passes the id GET parameter directly into a PHP exec() call in speechmac.php (line 18) without sanitization: exec(\"php jobs/speech_audio_mac.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 the application fails to properly sanitize user input before incorporating it into system execution calls. The specific issue occurs in speechmac.php at line 18 where the $_GET['id'] parameter is directly concatenated into a PHP exec() function without any form of input validation or sanitization. This design pattern creates an arbitrary code execution vector that allows remote attackers to inject malicious shell commands through the id parameter, effectively bypassing all authentication mechanisms since no authentication is required to exploit this vulnerability.
The technical implementation of this flaw demonstrates a classic lack of proper input sanitization and output encoding practices that are fundamental to secure coding standards. The exec() function in PHP executes system commands directly, making it extremely dangerous when user-controlled data is passed without proper validation. This vulnerability falls under the CWE-78 category for OS Command Injection, which is classified as a high-severity weakness due to its potential for complete system compromise. The absence of authentication requirements means that any remote attacker can exploit this without needing valid credentials, significantly increasing the attack surface and impact potential.
The operational impact of this vulnerability extends beyond simple command execution as it provides attackers with full control over the underlying operating system where the application runs. An attacker could potentially escalate privileges, access sensitive data, install backdoors, or use the compromised system as a pivot point for further network attacks. This type of vulnerability is particularly dangerous because it can be exploited through simple HTTP requests, making it easily accessible to attackers with basic web exploitation knowledge. The attack vector aligns with ATT&CK technique T1059.001 for command and scripting interpreter, specifically targeting the execution of system commands through legitimate system interfaces.
Mitigation strategies should focus on implementing proper input validation and sanitization mechanisms that prevent malicious characters from being processed as part of the command execution flow. The most effective approach would be to replace the direct concatenation with parameterized inputs or to use safer alternatives like escapeshellarg() or escapeshellcmd() functions in PHP to properly escape shell metacharacters. Additionally, implementing proper authentication and authorization checks would significantly reduce the attack surface, as this vulnerability is currently exploitable without any credentials. Organizations should also consider implementing web application firewalls and input filtering mechanisms to detect and block suspicious payloads attempting to exploit similar command injection vulnerabilities. The remediation process must include comprehensive code review practices aligned with secure coding guidelines such as those specified in OWASP Top Ten and NIST cybersecurity frameworks to prevent similar issues from occurring in future development cycles.