CVE-2026-6190: Construction Management System SQL Injection

CVE-2026-6190 Overview

A SQL injection vulnerability has been identified in itsourcecode Construction Management System version 1.0. The vulnerability exists in an unknown function within the /employees.php file, where improper handling of the Name argument allows attackers to manipulate database queries. This flaw enables remote attackers to inject malicious SQL statements, potentially compromising the integrity and confidentiality of the application's database.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to manipulate database queries, potentially extracting sensitive employee data, modifying records, or disrupting application functionality.

Affected Products

• itsourcecode Construction Management System 1.0
• /employees.php endpoint

Discovery Timeline

• 2026-04-13 - CVE CVE-2026-6190 published to NVD
• 2026-04-13 - Last updated in NVD database

Technical Details for CVE-2026-6190

Vulnerability Analysis

This vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), commonly associated with injection attacks. The affected component fails to properly sanitize user-supplied input in the Name parameter before incorporating it into SQL queries executed against the backend database.

The vulnerability is exploitable remotely over the network with low attack complexity. An authenticated attacker with low privileges can leverage this flaw to inject arbitrary SQL commands. The exploit has been publicly disclosed, increasing the risk of active exploitation attempts against vulnerable installations.

The impact includes partial compromise of data confidentiality, integrity, and availability within the affected system. While the vulnerability is contained to the vulnerable component without affecting other systems, successful exploitation could allow attackers to read, modify, or delete sensitive construction project and employee data stored in the database.

Root Cause

The root cause of this vulnerability is insufficient input validation and lack of parameterized queries in the /employees.php file. The application directly concatenates user-supplied data from the Name parameter into SQL queries without proper sanitization or escaping, enabling SQL injection attacks.

Attack Vector

The attack is initiated remotely via network access to the web application. An attacker can craft malicious HTTP requests to the /employees.php endpoint, injecting SQL statements through the Name parameter. The vulnerability requires low-level authentication but no user interaction, making it relatively straightforward to exploit once an attacker has basic access to the system.

The exploitation mechanism involves sending specially crafted input containing SQL metacharacters and statements that alter the intended query logic. This can be used to bypass authentication checks, extract database contents, modify data, or potentially execute administrative operations depending on database permissions.

Detection Methods for CVE-2026-6190

Indicators of Compromise

• Unusual or malformed HTTP requests to /employees.php containing SQL keywords or metacharacters in the Name parameter
• Database error messages appearing in application logs or responses indicating SQL syntax errors
• Unexpected database queries in database audit logs, particularly those containing UNION, SELECT, INSERT, UPDATE, DELETE, or comment sequences
• Evidence of data exfiltration or unauthorized data modifications in employee records

Detection Strategies

• Deploy web application firewall (WAF) rules to detect and block SQL injection patterns targeting the Name parameter
• Implement application-level logging to capture all requests to /employees.php for forensic analysis
• Configure database activity monitoring to alert on anomalous query patterns or unauthorized data access
• Use intrusion detection systems (IDS) with signatures for common SQL injection attack patterns

Monitoring Recommendations

• Monitor web server access logs for requests containing SQL injection payloads in query parameters
• Enable verbose database logging to track all queries executed against the application database
• Set up alerts for failed authentication attempts or unusual access patterns to employee data
• Review application logs regularly for error messages indicating SQL injection attempts

How to Mitigate CVE-2026-6190

Immediate Actions Required

• Restrict network access to the Construction Management System to trusted IP addresses only
• Implement web application firewall rules to filter SQL injection attempts targeting /employees.php
• Consider temporarily disabling the affected functionality until a patch is available
• Audit database access logs for signs of prior exploitation and assess potential data compromise

Patch Information

No official patch information is currently available from the vendor. Organizations using itsourcecode Construction Management System should monitor the IT Source Code Blog for security updates and patch releases. Additional technical details regarding this vulnerability can be found in the GitHub Issue Discussion and VulDB Vulnerability #357112.

Workarounds

• Implement input validation on the Name parameter to reject special characters and SQL metacharacters
• Use prepared statements or parameterized queries to prevent SQL injection if modifying the application code is possible
• Deploy a reverse proxy with SQL injection filtering capabilities in front of the application
• Restrict database user permissions to minimum required privileges, limiting the impact of successful injection attacks
• Enable application-level rate limiting to slow down automated exploitation attempts