CVE-2026-5368: Car Rental Project SQLi Vulnerability

CVE-2026-5368 Overview

A SQL injection vulnerability has been identified in projectworlds Car Rental Project 1.0. The vulnerability exists in an unknown function within the /login.php file of the Parameter Handler component. By manipulating the uname argument, an attacker can inject malicious SQL code, potentially gaining unauthorized access to the database. This vulnerability can be exploited remotely, and the exploit has been publicly disclosed and may be utilized by threat actors.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to bypass authentication, extract sensitive data, modify database records, or potentially gain further access to the underlying system through the compromised login mechanism.

Affected Products

• projectworlds Car Rental Project 1.0
• Login component (/login.php)
• Parameter Handler (uname argument)

Discovery Timeline

• 2026-04-02 - CVE-2026-5368 published to NVD
• 2026-04-02 - Last updated in NVD database

Technical Details for CVE-2026-5368

Vulnerability Analysis

This vulnerability falls under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), commonly known as injection. The affected /login.php file fails to properly sanitize or validate the uname parameter before incorporating it into SQL queries. This lack of input validation allows attackers to inject arbitrary SQL statements that are then executed by the database server.

The vulnerability can be exploited remotely over the network without requiring any authentication or user interaction. An attacker can craft malicious input that alters the intended SQL query logic, potentially bypassing authentication entirely or extracting sensitive information from the database.

Root Cause

The root cause of this vulnerability is insufficient input validation and the lack of parameterized queries in the login functionality. The uname parameter is directly concatenated into SQL queries without proper sanitization, escaping, or the use of prepared statements. This allows special SQL characters and syntax to be interpreted as part of the query rather than as data values.

Attack Vector

The attack is network-based and can be performed remotely against the vulnerable /login.php endpoint. An attacker would craft HTTP requests containing SQL injection payloads in the uname parameter. Since this affects the login page, successful exploitation could allow authentication bypass, enabling unauthorized access to the application. Additionally, depending on database permissions and configuration, attackers may be able to read sensitive data, modify or delete records, or execute administrative operations on the database server.

The vulnerability has been publicly disclosed, which increases the likelihood of exploitation attempts against unpatched systems. Attackers can leverage common SQL injection techniques such as UNION-based injection, boolean-based blind injection, or time-based blind injection to extract data or manipulate the database.

Detection Methods for CVE-2026-5368

Indicators of Compromise

• Unusual SQL syntax or escape characters in web server logs for /login.php requests
• Multiple failed login attempts followed by successful authentication from the same source
• Database error messages appearing in application responses
• Abnormal database query patterns or execution times

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns in the uname parameter
• Monitor web server access logs for requests containing common SQL injection keywords (UNION, SELECT, OR, AND, --, etc.) in the login endpoint
• Deploy database activity monitoring to detect unusual query patterns or unauthorized data access
• Utilize intrusion detection systems (IDS) with SQL injection signature detection capabilities

Monitoring Recommendations

• Enable detailed logging for the /login.php endpoint and all authentication-related activities
• Configure alerting for any database errors or exceptions triggered by the web application
• Monitor for reconnaissance activities targeting the login page, such as parameter fuzzing attempts
• Review authentication logs for anomalous successful logins, particularly from unusual IP addresses or at unusual times

How to Mitigate CVE-2026-5368

Immediate Actions Required

• Restrict access to the /login.php endpoint using IP whitelisting or network-level controls if possible
• Deploy a Web Application Firewall with SQL injection protection enabled
• Review and audit all user input handling in the application, particularly in authentication modules
• Consider taking the application offline if it processes sensitive data until a patch can be applied

Patch Information

At the time of this writing, no official vendor patch has been released for this vulnerability. Users should monitor the GitHub Vulnerability Issue and VulDB #354746 for updates on available patches or vendor communications. Given that projectworlds Car Rental Project appears to be a demonstration or educational project, users should evaluate whether continued use is appropriate in production environments.

Workarounds

• Implement input validation to allow only alphanumeric characters in the uname field
• Modify the source code to use parameterized queries or prepared statements for all database interactions
• Deploy a reverse proxy or WAF to filter malicious SQL injection attempts before they reach the application
• Implement additional authentication controls such as CAPTCHA or rate limiting to slow down automated attacks

# Example WAF rule for ModSecurity to block SQL injection in uname parameter
SecRule ARGS:uname "@detectSQLi" \
    "id:1001,\
    phase:2,\
    deny,\
    status:403,\
    msg:'SQL Injection attempt detected in uname parameter',\
    log,\
    auditlog"