CVE-2026-3735 identifies a SQL injection vulnerability in the Simple Flight Ticket Booking System version 1.0 developed by code-projects. The vulnerability resides in the SearchResultOneway.php file, where an input parameter (from) is improperly sanitized, allowing attackers to inject arbitrary SQL commands. This injection flaw enables remote attackers to manipulate backend database queries without requiring authentication or user interaction. The vulnerability can lead to unauthorized data disclosure, modification, or deletion, impacting the confidentiality, integrity, and availability of the system's data. The CVSS 4.0 score of 6.9 reflects a medium severity, considering the ease of exploitation (network vector, no privileges needed) but limited scope and impact. No official patches or fixes have been published yet, and no known exploits are actively observed in the wild. The vulnerability disclosure date is March 8, 2026. The affected system is a specialized flight ticket booking application, which may be used by small to medium travel agencies or organizations managing flight reservations. The lack of input validation and use of unsafe SQL query construction are the root causes. Attackers exploiting this flaw could gain access to sensitive booking information or disrupt service availability by corrupting database contents.

The potential impact of CVE-2026-3735 includes unauthorized access to sensitive customer and booking data, data tampering, and possible denial of service through database corruption. Organizations using the affected Simple Flight Ticket Booking System risk exposure of personally identifiable information (PII) and flight reservation details, which could lead to privacy violations and reputational damage. The integrity of booking records could be compromised, resulting in incorrect or fraudulent reservations. Availability may be affected if attackers execute destructive SQL commands. While the affected software is niche, any exploitation could disrupt business operations for travel agencies or service providers relying on this system. The remote, unauthenticated nature of the attack vector increases the risk, especially if the system is exposed to the internet without adequate protections. However, the lack of widespread use and no current exploits in the wild somewhat limit the immediate global impact.

To mitigate CVE-2026-3735, organizations should immediately review and sanitize all user inputs in the SearchResultOneway.php file, particularly the 'from' parameter. Implementing parameterized queries or prepared statements is critical to prevent SQL injection. If source code modification is not feasible, deploying a Web Application Firewall (WAF) with SQL injection detection rules can help block malicious payloads targeting this vulnerability. Network segmentation and limiting external access to the booking system reduce exposure. Regular security audits and code reviews should be conducted to identify similar injection flaws. Monitoring database logs for unusual queries and implementing strict database user permissions can limit damage if exploitation occurs. Organizations should also stay alert for any official patches or updates from the vendor and apply them promptly once available. Finally, educating developers on secure coding practices will help prevent future injection vulnerabilities.