CVE-2026-37591: Storage Unit Rental System SQLi Flaw

CVE-2026-37591 Overview

A SQL Injection vulnerability has been identified in Sourcecodester Storage Unit Rental Management System v1.0. The vulnerability exists in the file /storage/admin/tenants/view_details.php, allowing authenticated attackers with administrative privileges to inject malicious SQL queries through the application. This weakness (CWE-89: Improper Neutralization of Special Elements used in an SQL Command) enables unauthorized access to sensitive database information.

Critical Impact

Authenticated administrators can exploit this SQL injection flaw to extract sensitive data from the backend database, potentially compromising tenant information and system configurations.

Affected Products

• Sourcecodester Storage Unit Rental Management System v1.0

Discovery Timeline

• 2026-04-14 - CVE-2026-37591 published to NVD
• 2026-04-14 - Last updated in NVD database

Technical Details for CVE-2026-37591

Vulnerability Analysis

This SQL injection vulnerability affects the tenant details viewing functionality within the administrative panel of the Storage Unit Rental Management System. The vulnerable endpoint /storage/admin/tenants/view_details.php fails to properly sanitize user-supplied input before incorporating it into SQL queries. While the vulnerability requires high-privilege (administrator) access to exploit, successful exploitation allows extraction of confidential data from the underlying database.

The attack can be performed remotely over the network without requiring user interaction. The scope is unchanged, meaning the vulnerable component and impacted component are the same, and the impact is limited to confidentiality with no effect on integrity or availability.

Root Cause

The root cause is insufficient input validation and lack of parameterized queries in the view_details.php file. User-controlled parameters are directly concatenated into SQL statements without proper sanitization or use of prepared statements, creating an injection point that attackers can leverage to manipulate database queries.

Attack Vector

An authenticated administrator can craft malicious SQL payloads targeting the vulnerable parameter in the tenant details page. By injecting SQL syntax into the affected input field, attackers can modify the intended query logic to extract data from other database tables, enumerate database structure, or access records they should not have visibility to.

The attack is network-based and does not require user interaction beyond the attacker authenticating to the admin panel. For detailed technical information about the vulnerability mechanics, refer to the GitHub SQL Injection Report.

Detection Methods for CVE-2026-37591

Indicators of Compromise

• Unusual SQL syntax or special characters (e.g., ', ", --, UNION, SELECT) in HTTP request parameters targeting /storage/admin/tenants/view_details.php
• Database error messages appearing in application responses indicating malformed queries
• Abnormal database query patterns or unexpected data access from the web application user account
• Log entries showing repeated requests to the vulnerable endpoint with varying parameter values

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common SQL injection patterns in requests to the application
• Enable detailed logging for the /storage/admin/tenants/view_details.php endpoint and monitor for suspicious input patterns
• Deploy database activity monitoring to identify unusual query structures or unauthorized data access attempts
• Use application-layer intrusion detection to flag requests containing SQL keywords in unexpected parameter positions

Monitoring Recommendations

• Review web server access logs for requests to the tenant details endpoint with encoded or obfuscated SQL injection payloads
• Monitor database logs for queries containing union-based or error-based SQL injection techniques
• Establish alerts for failed authentication attempts followed by exploitation attempts against admin endpoints
• Track data exfiltration indicators such as unusually large response sizes from the affected endpoint

How to Mitigate CVE-2026-37591

Immediate Actions Required

• Restrict access to the administrative panel to trusted IP addresses only until a patch is available
• Implement additional authentication controls or multi-factor authentication for admin accounts
• Deploy a Web Application Firewall with SQL injection detection rules in front of the application
• Review and audit administrator accounts to ensure no unauthorized access has occurred

Patch Information

No vendor patch information is currently available for this vulnerability. Organizations should monitor the GitHub SQL Injection Report and Sourcecodester resources for updates. Given that this is an open-source project, consider reviewing and patching the vulnerable code directly if possible.

Workarounds

• Implement parameterized queries or prepared statements in the view_details.php file to prevent SQL injection
• Apply input validation and sanitization for all user-supplied parameters before database operations
• Use a database account with minimal privileges (least privilege principle) for the web application
• Consider temporarily disabling the tenant details functionality if it is not critical to operations

# Example: Restrict admin panel access via Apache .htaccess
<Location "/storage/admin/">
    Order deny,allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Location>