CVE-2026-3046: Emiloi E-logbook COVID-19 SQLi Vulnerability

CVE-2026-3046 Overview

A SQL Injection vulnerability has been identified in itsourcecode E-Logbook with Health Monitoring System for COVID-19 version 1.0. This vulnerability affects the file /check_profile_old.php where improper handling of the profile_id argument allows attackers to inject malicious SQL commands. The vulnerability can be exploited remotely without authentication, potentially allowing unauthorized access to sensitive health monitoring data stored in the application's database.

Critical Impact

Remote attackers can exploit this SQL Injection vulnerability to read, modify, or delete sensitive COVID-19 health monitoring data, potentially compromising patient privacy and system integrity.

Affected Products

• Emiloi E-Logbook with Health Monitoring System for COVID-19 version 1.0
• Systems running /check_profile_old.php endpoint with unpatched codebase

Discovery Timeline

• 2026-02-24 - CVE-2026-3046 published to NVD
• 2026-02-25 - Last updated in NVD database

Technical Details for CVE-2026-3046

Vulnerability Analysis

The vulnerability exists in the /check_profile_old.php file of the E-Logbook with Health Monitoring System for COVID-19. The application fails to properly sanitize user-supplied input passed through the profile_id parameter before incorporating it into SQL queries. This classic SQL Injection flaw (CWE-89) falls under the broader category of Injection vulnerabilities (CWE-74).

When a user submits a request to the vulnerable endpoint, the profile_id parameter value is directly concatenated into SQL statements without proper input validation, parameterized queries, or prepared statements. This allows attackers to manipulate the SQL logic and execute arbitrary database commands.

The vulnerability is particularly concerning given the sensitive nature of the health monitoring data stored in the system, which may include COVID-19 patient information, health records, and personal identifying information.

Root Cause

The root cause of this vulnerability is improper input validation and the use of unsanitized user input in SQL query construction. The application directly incorporates the profile_id parameter into database queries without implementing proper security controls such as parameterized queries, input validation, or escaping special characters. This coding practice violates secure development principles and creates a direct pathway for SQL Injection attacks.

Attack Vector

The attack can be executed remotely over the network without requiring authentication. An attacker can craft malicious HTTP requests to the /check_profile_old.php endpoint with a specially crafted profile_id parameter containing SQL syntax. The injected SQL commands are then executed by the database server with the same privileges as the application's database user.

Typical attack scenarios include:

• Extracting sensitive health monitoring data using UNION-based SQL injection
• Bypassing authentication mechanisms by manipulating query logic
• Modifying or deleting records through INSERT, UPDATE, or DELETE statement injection
• Potential database server compromise through advanced techniques like stacked queries (depending on database configuration)

The vulnerability has been publicly disclosed, making it easier for attackers to develop exploits targeting unpatched installations.

Detection Methods for CVE-2026-3046

Indicators of Compromise

• Unusual HTTP requests to /check_profile_old.php containing SQL syntax characters such as single quotes ('), double quotes ("), semicolons (;), or comment sequences (--, /*)
• Database error messages exposed in application responses indicating SQL syntax errors
• Abnormal database query patterns or unexpected data access in database audit logs
• Large data exfiltration from the database server associated with the application

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common SQL Injection patterns targeting the profile_id parameter
• Enable database query logging and monitor for anomalous queries originating from the web application
• Deploy intrusion detection systems (IDS) with signatures for SQL Injection attack patterns
• Review web server access logs for suspicious requests to /check_profile_old.php with encoded or malformed parameters

Monitoring Recommendations

• Set up real-time alerting for database errors and exceptions generated by the E-Logbook application
• Monitor network traffic for unusual data volumes being transferred from the database server
• Implement application-level logging to track all requests to sensitive endpoints including /check_profile_old.php
• Regularly audit database access patterns and user queries for signs of unauthorized data access

How to Mitigate CVE-2026-3046

Immediate Actions Required

• Restrict or disable access to /check_profile_old.php until a proper fix can be applied
• Implement input validation on the profile_id parameter to accept only expected numeric values
• Deploy a Web Application Firewall (WAF) with SQL Injection protection rules as a temporary measure
• Audit database access logs to identify any potential exploitation that may have already occurred

Patch Information

As of the last update on 2026-02-25, no official patch has been released by the vendor. Organizations using this software should monitor the GitHub Issue Tracker Entry and the IT Source Code Homepage for updates and security advisories. Additionally, vulnerability details are tracked at VulDB #347406.

Workarounds

• Replace vulnerable code with parameterized queries or prepared statements that separate SQL logic from user input
• Implement strict input validation to ensure profile_id only accepts integer values
• Apply the principle of least privilege to the database user account used by the application to limit potential damage from successful exploitation
• Consider removing or renaming the legacy /check_profile_old.php file if it is no longer required for application functionality

# Configuration example - Apache mod_rewrite to block access to vulnerable endpoint
# Add to .htaccess or Apache configuration
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteRule ^check_profile_old\.php$ - [F,L]
</IfModule>