CVE-2026-3790 is an SQL injection vulnerability identified in SourceCodester Sales and Inventory System version 1.0. The vulnerability resides in the check_supplier_details.php file, specifically in the POST parameter stock_name1, which is improperly sanitized or validated. This allows an attacker to inject malicious SQL code remotely without requiring authentication or user interaction. The injection flaw can lead to unauthorized data retrieval, modification, or deletion within the backend database, compromising data confidentiality, integrity, and availability. The vulnerability has a CVSS 4.0 base score of 5.3, indicating medium severity, with an attack vector of network (remote), low attack complexity, no privileges required, and no user interaction needed. The scope is limited to the vulnerable component, and the impact on confidentiality, integrity, and availability is low to medium. Although no active exploitation in the wild has been reported, the availability of a public exploit increases the likelihood of future attacks. The vulnerability affects only version 1.0 of the product, and no official patches have been linked yet. Organizations using this system should monitor for updates and consider immediate mitigations to prevent exploitation.

The impact of CVE-2026-3790 includes potential unauthorized access to sensitive supplier and inventory data, data manipulation, and disruption of inventory management processes. Exploitation can lead to leakage of confidential business information, alteration of stock records, and potential denial of service if the database is corrupted. This can affect operational continuity, financial reporting accuracy, and supply chain reliability. Organizations relying on SourceCodester Sales and Inventory System version 1.0 may face increased risk of data breaches and operational disruptions. The medium severity rating reflects moderate risk, but the ease of remote exploitation without authentication raises concern for widespread attacks if mitigations are not applied promptly.

1. Immediate mitigation should include implementing input validation and parameterized queries or prepared statements in the check_supplier_details.php file to prevent SQL injection. 2. Restrict access to the vulnerable endpoint by applying network-level controls such as IP whitelisting or VPN access where feasible. 3. Monitor web application logs for suspicious requests targeting the stock_name1 parameter to detect potential exploitation attempts. 4. Employ Web Application Firewalls (WAFs) with rules specifically designed to detect and block SQL injection payloads targeting this parameter. 5. Regularly update and patch the SourceCodester Sales and Inventory System once official fixes become available from the vendor. 6. Conduct security audits and code reviews of custom or third-party components to identify and remediate similar injection flaws. 7. Educate development teams on secure coding practices to prevent future injection vulnerabilities.