CVE-2026-6166: Vehicle Showroom Management System SQLi

CVE-2026-6166 Overview

A SQL Injection vulnerability has been identified in code-projects Vehicle Showroom Management System version 1.0. This security flaw affects the file /util/UpdateVehicleFunction.php where improper handling of the VEHICLE_ID parameter allows attackers to inject malicious SQL statements. The vulnerability can be exploited remotely without authentication, enabling unauthorized database access, data manipulation, or extraction of sensitive information stored in the application's backend database.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to bypass authentication, extract sensitive vehicle and customer data, modify database records, or potentially gain further access to the underlying server infrastructure.

Affected Products

• code-projects Vehicle Showroom Management System 1.0
• Systems running /util/UpdateVehicleFunction.php endpoint

Discovery Timeline

• 2026-04-13 - CVE-2026-6166 published to NVD
• 2026-04-13 - Last updated in NVD database

Technical Details for CVE-2026-6166

Vulnerability Analysis

This vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), commonly known as Injection. The vulnerability exists in the UpdateVehicleFunction.php file within the Vehicle Showroom Management System application. When user-supplied input is passed through the VEHICLE_ID argument, the application fails to properly sanitize or parameterize the input before incorporating it into SQL queries.

The lack of input validation allows an attacker to craft malicious input containing SQL syntax that gets interpreted as part of the database query rather than as data. This can lead to unauthorized data access, data modification, or complete database compromise depending on the database user privileges and configuration.

Root Cause

The root cause of this vulnerability is the failure to implement proper input validation and parameterized queries (prepared statements) when processing the VEHICLE_ID parameter in /util/UpdateVehicleFunction.php. The application directly concatenates user-supplied input into SQL query strings, creating an injection point that attackers can exploit.

Attack Vector

The attack can be initiated remotely over the network without requiring authentication. An attacker would craft a malicious HTTP request to the /util/UpdateVehicleFunction.php endpoint with a specially crafted VEHICLE_ID parameter containing SQL injection payloads. The exploit has been publicly disclosed, meaning attack techniques are available to potential threat actors.

Common attack scenarios include using UNION-based injection to extract data from other tables, boolean-based blind injection to enumerate database contents character by character, or time-based injection when error messages are suppressed. The attacker could potentially dump user credentials, customer information, vehicle inventory data, or modify pricing and availability records.

Detection Methods for CVE-2026-6166

Indicators of Compromise

• Unusual SQL syntax or special characters in web server access logs for /util/UpdateVehicleFunction.php
• Database error messages appearing in application logs or responses
• Unexpected database queries containing UNION SELECT, OR 1=1, or similar injection patterns
• Anomalous data extraction or bulk SELECT operations in database audit logs

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common SQL injection patterns in requests to the affected endpoint
• Monitor web server access logs for requests containing SQL keywords (SELECT, UNION, INSERT, UPDATE, DELETE) in the VEHICLE_ID parameter
• Enable database query logging and alert on queries with suspicious syntax patterns or unusual execution times
• Deploy intrusion detection systems (IDS) with signatures for SQL injection attack patterns

Monitoring Recommendations

• Enable detailed logging for all requests to /util/UpdateVehicleFunction.php and related PHP files
• Configure database audit logging to capture all queries executed against the application database
• Set up alerts for failed login attempts or authentication anomalies that may indicate credential extraction
• Monitor for unexpected outbound connections from the database server that could indicate data exfiltration

How to Mitigate CVE-2026-6166

Immediate Actions Required

• Restrict access to /util/UpdateVehicleFunction.php through firewall rules or authentication requirements until a patch is available
• Implement input validation on the VEHICLE_ID parameter to accept only expected numeric values
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules
• Review database user privileges and apply principle of least privilege to limit potential impact

Patch Information

At the time of publication, no official patch from the vendor has been identified. Organizations should monitor the Code Projects website and the GitHub issue discussion for updates regarding security fixes. Additional vulnerability details are available at VulDB Vulnerability #357054.

Workarounds

• Implement prepared statements (parameterized queries) in the affected PHP file to prevent SQL injection
• Add server-side input validation to ensure VEHICLE_ID contains only expected numeric characters using functions like intval() or filter_var() with FILTER_VALIDATE_INT
• Consider disabling or removing the affected functionality if it is not critical to business operations
• Place the application behind a reverse proxy with SQL injection filtering capabilities

# Example .htaccess rule to restrict access to vulnerable endpoint
<Files "UpdateVehicleFunction.php">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
</Files>