CVE-2026-0592 identifies a SQL injection vulnerability in the code-projects Online Product Reservation System version 1.0. The vulnerability resides in the User Registration Handler component, specifically within the /handgunner-administrator/register_code.php script. Multiple input parameters—fname, lname, address, city, province, country, zip, tel_no, email, and username—are improperly sanitized, allowing an attacker to inject malicious SQL code. This injection flaw enables remote attackers to manipulate backend database queries without authentication or user interaction. The consequence of successful exploitation could include unauthorized data retrieval, data modification, or deletion, potentially compromising the confidentiality, integrity, and availability of the reservation system's data. The CVSS 4.0 base score is 6.9 (medium severity), reflecting the ease of exploitation (network accessible, no privileges required) and the partial impact on confidentiality, integrity, and availability. Although no patches have been linked yet, the public release of exploit code increases the urgency for mitigation. The vulnerability affects only version 1.0 of the product, which may limit exposure depending on deployment. The lack of authentication and user interaction requirements broadens the attack surface, making this a significant risk for organizations relying on this system for online product reservations.

For European organizations, exploitation of CVE-2026-0592 could lead to unauthorized access to sensitive customer and business data stored within the Online Product Reservation System. This may result in data breaches involving personally identifiable information (PII), financial data, or reservation details, potentially violating GDPR and other data protection regulations. The integrity of reservation data could be compromised, leading to fraudulent bookings or denial of service through data manipulation or deletion. The availability of the reservation system could also be affected if attackers execute destructive SQL commands. Organizations in retail, hospitality, or any sector using this system may face operational disruptions, reputational damage, and regulatory penalties. The public availability of exploit code increases the likelihood of opportunistic attacks, especially targeting unpatched or poorly secured installations. Given the remote and unauthenticated nature of the attack, the threat is significant for any European entity using this vulnerable software without mitigations.

1. Immediate application of vendor patches or updates once available is critical. Since no patch links are currently provided, organizations should monitor vendor advisories closely. 2. Implement Web Application Firewall (WAF) rules to detect and block SQL injection attempts targeting the vulnerable parameters. 3. Conduct thorough input validation and sanitization on all user-supplied data, especially for the affected parameters (fname, lname, address, city, province, country, zip, tel_no, email, username). 4. Employ parameterized queries or prepared statements in the application code to prevent injection. 5. Restrict access to the /handgunner-administrator/ directory via network segmentation or IP whitelisting to reduce exposure. 6. Monitor logs for suspicious activities related to SQL injection attempts and unusual database queries. 7. Consider deploying database activity monitoring tools to detect anomalous query patterns. 8. Educate development and security teams about secure coding practices to prevent similar vulnerabilities in future releases. 9. If immediate patching is not possible, consider temporarily disabling the vulnerable registration functionality or isolating the affected system until remediation is complete.