CVE-2026-3705: Flight Ticket Booking System SQLi Flaw

CVE-2026-3705 Overview

A SQL injection vulnerability has been identified in code-projects Simple Flight Ticket Booking System version 1.0. This issue affects the processing of the file /Adminsearch.php, where manipulation of the flightno argument enables SQL injection attacks. The vulnerability can be exploited remotely, and exploit details have been made publicly available.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to manipulate database queries, potentially accessing, modifying, or deleting sensitive flight booking data and user information stored in the application's database.

Affected Products

• Carmelo Simple Flight Ticket Booking System 1.0

Discovery Timeline

• March 8, 2026 - CVE-2026-3705 published to NVD
• March 9, 2026 - Last updated in NVD database

Technical Details for CVE-2026-3705

Vulnerability Analysis

This vulnerability is classified under CWE-89 (SQL Injection) and CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component). The affected component, /Adminsearch.php, accepts a flightno parameter that is directly incorporated into SQL queries without proper sanitization or parameterization. This allows an attacker to inject malicious SQL statements that the database will execute, potentially compromising data confidentiality, integrity, and availability.

The network-accessible nature of this vulnerability means that any attacker with remote access to the application can attempt exploitation without requiring authentication or user interaction.

Root Cause

The root cause of this vulnerability is improper input validation and the lack of parameterized queries in the /Adminsearch.php file. The flightno parameter is directly concatenated into SQL statements without sanitization, allowing attackers to inject arbitrary SQL commands. This is a classic example of insecure coding practices where user-supplied input is trusted and passed directly to database operations.

Attack Vector

The attack can be initiated remotely over the network. An attacker can craft malicious HTTP requests to the /Adminsearch.php endpoint, injecting SQL payloads through the flightno parameter. Since the exploit has been publicly disclosed, attackers can leverage existing techniques to extract database contents, bypass authentication mechanisms, or potentially execute administrative database operations depending on the database user privileges.

The vulnerability requires no authentication or user interaction to exploit, making it straightforward for attackers to target vulnerable instances. By manipulating the flightno parameter with SQL injection payloads, attackers can construct queries that return unauthorized data, modify records, or perform other database operations.

Detection Methods for CVE-2026-3705

Indicators of Compromise

• Anomalous HTTP requests to /Adminsearch.php containing SQL syntax characters such as single quotes, double dashes, UNION statements, or SQL keywords
• Database logs showing unexpected queries or errors originating from the flight search functionality
• Web server access logs with unusual flightno parameter values containing encoded or unencoded SQL injection payloads

Detection Strategies

• Deploy web application firewall (WAF) rules to detect and block SQL injection patterns in the flightno parameter
• Enable database query logging and alert on queries containing suspicious patterns or syntax errors from the booking application
• Implement intrusion detection system (IDS) signatures targeting known SQL injection techniques against the /Adminsearch.php endpoint

Monitoring Recommendations

• Monitor HTTP traffic for requests to /Adminsearch.php with abnormal parameter lengths or special characters
• Set up alerts for database authentication failures or unauthorized data access attempts
• Review application logs regularly for signs of exploitation attempts or data exfiltration patterns

How to Mitigate CVE-2026-3705

Immediate Actions Required

• Restrict access to the /Adminsearch.php endpoint using network-level controls or authentication requirements
• Implement a web application firewall with SQL injection protection rules as an interim measure
• Consider temporarily disabling the admin search functionality if it is not critical to operations

Patch Information

No official vendor patch has been released at this time. The vulnerability was identified in code-projects Simple Flight Ticket Booking System 1.0, which is distributed through the Code Projects Resource Hub. Users should monitor the vendor's website and the GitHub CVE Issue Discussion for updates and potential fixes. Additional technical details are available via VulDB ID #349651.

Workarounds

• Implement prepared statements with parameterized queries in the /Adminsearch.php file to prevent SQL injection
• Apply strict input validation on the flightno parameter, allowing only expected characters (alphanumeric flight numbers)
• Use a web application firewall to filter malicious requests until a proper code fix is implemented
• Limit database user privileges for the application to reduce potential impact of successful exploitation

# Example: Apache ModSecurity rule to block SQL injection attempts
SecRule ARGS:flightno "@detectSQLi" "id:1001,phase:2,deny,status:403,log,msg:'SQL Injection attempt detected in flightno parameter'"