CVE-2026-3736: Php

Overview

A high-severity SQL injection vulnerability, tracked as CVE-2026-3736, has been discovered in the code-projects Simple Flight Ticket Booking System version 1.0. This flaw resides in the SearchResultRoundtrip.php file and allows remote attackers to execute malicious SQL commands by manipulating the from parameter. The vulnerability is remotely exploitable, and a public proof-of-concept exploit exists, increasing the immediate risk of attack.

Vulnerability Details

In simple terms, the application does not properly validate or sanitize user input in its flight search functionality. Specifically, when a user submits data for the “from” location during a roundtrip search, the application fails to check this input before using it to construct a database query. An attacker can craft a special input string containing SQL code. When processed, this malicious input tricks the database into executing unintended commands, such as reading, modifying, or deleting sensitive information stored within the booking system’s database.

Potential Impact

The impact of this vulnerability is severe. A successful SQL injection attack can lead to:

• Data Breach: Unauthorized access to the entire database, potentially exposing passenger personal data, payment information, travel itineraries, and administrator credentials. For context on the risks of exposed data, recent incidents are detailed in our breach reports.
• Data Manipulation or Loss: Attackers could alter booking records, cancel flights, or delete critical data.
• System Compromise: In some scenarios, this could be used as a foothold to gain further control over the underlying server.

Given the public availability of an exploit, unpatched systems are at a high risk of being targeted.

Remediation and Mitigation

Immediate action is required to secure affected systems.

1. Apply a Patch or Update: Contact the software vendor (code-projects) immediately to obtain a patched version of the Simple Flight Ticket Booking System. If an official patch is not yet available, consider the following mitigations.
2. Input Validation and Parameterized Queries: The permanent fix involves modifying the SearchResultRoundtrip.php code to use parameterized queries (prepared statements) for all database interactions. This ensures user input is treated strictly as data, not executable code.
3. Temporary Mitigation: As an interim measure, implement strict input validation on the server-side for the from parameter, allowing only expected characters (e.g., letters and hyphens). Additionally, ensure the database account used by the application has the minimum necessary privileges (principle of least privilege) to limit potential damage.
4. Monitor for Intrusion: Closely review application and database logs for any suspicious SQL errors or unexpected query patterns, which can be early indicators of an attack attempt. Stay informed on emerging threats through our security news.

Organizations using this software should prioritize this update to prevent potential data theft and system compromise.