CVE-2026-0576 is a SQL injection vulnerability identified in version 1.0 of the code-projects Online Product Reservation System, specifically in the /handgunner-administrator/prod.php file's Parameter Handler component. The vulnerability arises from improper sanitization and validation of user-supplied input parameters such as cat, price, name, model, and serial. An attacker can remotely manipulate these parameters to inject malicious SQL code, potentially allowing unauthorized access to the backend database. The vulnerability does not require authentication or user interaction, making it easier to exploit. The CVSS 4.0 base score is 6.9, indicating medium severity, with an attack vector of network (remote), low attack complexity, and no privileges or user interaction needed. The impact includes partial loss of confidentiality, integrity, and availability of the database. Although no active exploitation has been reported, a public exploit exists, increasing the urgency for remediation. The absence of official patches necessitates immediate mitigation through secure coding practices and monitoring. This vulnerability can lead to data leakage, unauthorized data modification, or denial of service, severely affecting organizations relying on this system for product reservations.

For European organizations, exploitation of this vulnerability could result in unauthorized access to sensitive customer and product reservation data, leading to data breaches and loss of customer trust. The integrity of reservation data could be compromised, causing operational disruptions and financial losses. Availability of the reservation system could also be affected if attackers execute denial-of-service conditions via crafted SQL queries. Organizations in sectors such as retail, e-commerce, and logistics that use the affected product may face regulatory penalties under GDPR if personal data is exposed. The public availability of an exploit increases the risk of automated attacks targeting vulnerable systems. Additionally, supply chain disruptions could occur if reservation systems are compromised, impacting broader business operations. The medium severity rating suggests a significant but not critical threat, yet the ease of remote exploitation without authentication elevates the urgency for mitigation.

1. Immediately implement input validation and sanitization for all user-supplied parameters, especially cat, price, name, model, and serial, to prevent injection of malicious SQL code. 2. Refactor the affected code to use parameterized queries or prepared statements to eliminate direct concatenation of user input in SQL commands. 3. Deploy Web Application Firewalls (WAFs) with rules specifically designed to detect and block SQL injection attempts targeting the vulnerable endpoints. 4. Monitor database logs and application logs for unusual query patterns or errors indicative of SQL injection attempts. 5. Restrict database user permissions to the minimum necessary to limit the impact of a potential injection attack. 6. If possible, isolate the affected system within the network and limit external access until patches or mitigations are applied. 7. Engage with the vendor or community to obtain or develop official patches or updates addressing this vulnerability. 8. Conduct regular security assessments and penetration testing to verify the effectiveness of applied mitigations. 9. Educate developers and administrators about secure coding practices and the risks of SQL injection vulnerabilities.