CVE-2026-5823 Overview
A SQL injection vulnerability has been identified in itsourcecode Construction Management System 1.0. The vulnerability affects the /borrowed_tool_report.php file, where improper handling of the Home argument allows attackers to inject malicious SQL statements. This weakness enables remote attackers to manipulate database queries, potentially leading to unauthorized data access, modification, or deletion.
Critical Impact
Remote attackers can exploit this SQL injection vulnerability to bypass authentication, extract sensitive data from the database, modify records, or potentially gain further access to the underlying system.
Affected Products
- itsourcecode Construction Management System 1.0
Discovery Timeline
- April 9, 2026 - CVE-2026-5823 published to NVD
- April 9, 2026 - Last updated in NVD database
Technical Details for CVE-2026-5823
Vulnerability Analysis
This SQL injection vulnerability (classified under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) exists in the /borrowed_tool_report.php file of the Construction Management System. The application fails to properly sanitize user-supplied input passed through the Home argument before incorporating it into SQL queries.
When user input is directly concatenated into SQL statements without proper validation or parameterization, attackers can craft malicious input that alters the intended query logic. This allows them to execute arbitrary SQL commands against the backend database, potentially compromising the confidentiality, integrity, and availability of stored data.
The network-accessible nature of this vulnerability means that any authenticated user with access to the affected endpoint can potentially exploit it without requiring physical access to the system.
Root Cause
The root cause of this vulnerability is the lack of proper input sanitization and the absence of parameterized queries (prepared statements) in the PHP code handling the Home argument. The application directly incorporates user-controlled input into SQL queries, allowing special SQL characters and commands to be interpreted by the database engine rather than treated as literal data.
Attack Vector
The attack can be initiated remotely over the network by an authenticated user. An attacker would submit crafted input containing SQL metacharacters and commands through the Home parameter in requests to /borrowed_tool_report.php. The malicious SQL payload is then executed by the database, allowing the attacker to:
- Extract sensitive data from database tables
- Modify or delete existing records
- Bypass application-level access controls
- Potentially escalate privileges within the database
The vulnerability requires low privileges to exploit, and no user interaction is needed beyond the attacker's own actions. According to available references, exploit details have been made publicly available, which increases the risk of active exploitation.
Detection Methods for CVE-2026-5823
Indicators of Compromise
- Unusual or malformed HTTP requests to /borrowed_tool_report.php containing SQL syntax in the Home parameter
- Database error messages appearing in application logs or responses indicating SQL syntax errors
- Unexpected database queries or data extraction patterns in database audit logs
- Authentication bypass attempts or unauthorized access to administrative functions
Detection Strategies
- Implement Web Application Firewall (WAF) rules to detect SQL injection patterns in requests to the affected endpoint
- Monitor application and database logs for suspicious query patterns, especially those containing UNION, SELECT, OR 1=1, and similar SQL injection payloads
- Deploy intrusion detection systems (IDS) with signatures for common SQL injection attack patterns
- Review access logs for repeated requests to /borrowed_tool_report.php with varying parameter values
Monitoring Recommendations
- Enable detailed logging for all database queries executed by the Construction Management System
- Set up alerts for failed SQL queries that may indicate injection attempts
- Monitor for unusual data access patterns or large data exports from the database
- Track authentication events and session anomalies that may indicate successful exploitation
How to Mitigate CVE-2026-5823
Immediate Actions Required
- Restrict network access to the Construction Management System to trusted IP addresses only
- Implement additional authentication controls for the /borrowed_tool_report.php endpoint
- Deploy a Web Application Firewall with SQL injection protection rules
- Review database user permissions and apply principle of least privilege
- Consider temporarily disabling the affected functionality if not business-critical
Patch Information
At the time of publication, no official vendor patch has been released. Organizations using itsourcecode Construction Management System 1.0 should monitor the IT Source Code Homepage for security updates. Additional vulnerability details are available through VulDB Vulnerability #356270 and the GitHub Issue Report.
Workarounds
- Implement input validation at the application level to reject SQL metacharacters in the Home parameter
- Use prepared statements with parameterized queries if modifying the source code is possible
- Deploy a reverse proxy with request filtering to sanitize input before it reaches the application
- Isolate the database server and restrict its network connectivity to only the application server
- Enable database query logging and implement real-time monitoring for suspicious activity
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
