CVE-2026-3806 is a SQL injection vulnerability identified in SourceCodester's Resort Reservation System version 1.0, specifically within the /room_rates.php script. The vulnerability arises from improper sanitization or validation of the 'q' parameter, which is used in SQL queries to retrieve or manipulate room rate data. An attacker can remotely send crafted input to this parameter, injecting arbitrary SQL commands that the backend database executes. This can lead to unauthorized data disclosure, data modification, or even full compromise of the database depending on the database permissions. The vulnerability does not require authentication or user interaction, making it easier to exploit. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:L), no user interaction (UI:N), and impacts on confidentiality, integrity, and availability at a low level (VC:L, VI:L, VA:L). No patches have been linked yet, and no active exploits are reported, but a public exploit is available, increasing the risk of future attacks. The vulnerability affects only version 1.0 of the product, which is a niche reservation system likely used by small to medium hospitality businesses.

The SQL injection vulnerability could allow attackers to access sensitive customer and booking data stored in the backend database, violating confidentiality. Attackers might also alter or delete reservation data, impacting data integrity and potentially causing operational disruptions. In some cases, attackers could escalate the attack to execute administrative commands on the database server, affecting availability or leading to full system compromise. For organizations relying on this system, exploitation could result in data breaches, financial losses, reputational damage, and regulatory penalties, especially in jurisdictions with strict data protection laws. The medium CVSS score reflects a moderate risk, but the availability of a public exploit increases the urgency. The impact is more significant for organizations with high volumes of sensitive customer data or those integrated with other critical systems.

Organizations should immediately audit their use of SourceCodester Resort Reservation System version 1.0 and isolate affected instances. Since no official patch is currently available, implement input validation and parameterized queries or prepared statements for the 'q' parameter in /room_rates.php to prevent SQL injection. Employ web application firewalls (WAFs) with rules targeting SQL injection patterns to block malicious requests. Conduct thorough code reviews and penetration testing to identify and remediate similar injection points. Restrict database user permissions to the minimum necessary to limit the impact of potential injection attacks. Monitor logs for suspicious query patterns or unexpected database errors. Plan to upgrade to a patched or newer version once available or consider migrating to a more secure reservation system. Regularly back up databases and test restoration procedures to mitigate data loss risks.