CVE-2026-0590 identifies a SQL injection vulnerability in the Online Product Reservation System version 1.0 developed by code-projects. The vulnerability resides in the POST parameter handler of the /app/checkout/delete.php script, specifically in the processing of the 'ID' parameter. An attacker can remotely manipulate this parameter to inject arbitrary SQL commands into the backend database query. This occurs because the input is not properly sanitized or parameterized before being incorporated into SQL statements. The vulnerability allows attackers to execute unauthorized SQL queries, potentially leading to unauthorized data retrieval, modification, or deletion. The attack vector is network-based, requiring no authentication or user interaction, which lowers the barrier for exploitation. The CVSS 4.0 vector indicates low complexity (AC:L), no privileges required (PR:L), no user interaction (UI:N), and partial impacts on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). Although no public patches are currently linked, the vulnerability has been publicly disclosed, increasing the risk of exploitation. The system's role in managing product reservations means that exploitation could disrupt business operations and compromise sensitive customer or transactional data.

The SQL injection vulnerability in the Online Product Reservation System can have significant impacts on organizations that rely on this software for managing product reservations. Exploitation can lead to unauthorized access to sensitive customer data, including personal and transactional information, which compromises confidentiality. Attackers may alter or delete reservation records, impacting data integrity and potentially causing operational disruptions. Availability may also be affected if attackers execute destructive queries or cause database errors, leading to denial of service conditions. The remote and unauthenticated nature of the exploit increases the risk of widespread attacks, especially if the system is internet-facing. Organizations could face reputational damage, regulatory penalties for data breaches, and financial losses due to disrupted business processes. The medium CVSS score reflects moderate risk, but the actual impact depends on the deployment context and the sensitivity of the data managed by the system.

To mitigate CVE-2026-0590, organizations should first seek any official patches or updates from the vendor code-projects and apply them promptly once available. In the absence of patches, immediate remediation includes implementing strict input validation and sanitization on the 'ID' parameter in /app/checkout/delete.php to prevent malicious SQL code injection. Refactoring the code to use parameterized queries or prepared statements is critical to eliminate SQL injection risks. Employing web application firewalls (WAFs) with custom rules to detect and block SQL injection attempts targeting this endpoint can provide temporary protection. Regular security testing, including automated vulnerability scanning and manual code reviews focusing on database query handling, should be conducted. Additionally, monitoring database logs and application logs for suspicious query patterns can help detect exploitation attempts early. Restricting database user permissions to the minimum necessary can limit the damage if exploitation occurs. Finally, educating development teams on secure coding practices will help prevent similar vulnerabilities in future releases.