CVE-2026-2134: PHPGurukul HMS SQL Injection Vulnerability

CVE-2026-2134 Overview

A SQL injection vulnerability has been identified in PHPGurukul Hospital Management System version 4.0. The vulnerability exists in the /hms/admin/manage-doctors.php file, where the ID parameter is improperly handled, allowing attackers to inject malicious SQL queries. This flaw can be exploited remotely by authenticated users with administrative privileges, potentially leading to unauthorized data access, modification, or deletion within the hospital database.

Critical Impact

Remote attackers with administrative access can exploit this SQL injection vulnerability to extract sensitive patient records, modify medical data, or compromise the entire hospital management database.

Affected Products

• PHPGurukul Hospital Management System 4.0

Discovery Timeline

• 2026-02-08 - CVE-2026-2134 published to NVD
• 2026-02-11 - Last updated in NVD database

Technical Details for CVE-2026-2134

Vulnerability Analysis

This SQL injection vulnerability occurs due to insufficient input validation in the doctor management functionality of the Hospital Management System. When processing the ID parameter in the manage-doctors.php file, the application fails to properly sanitize user-supplied input before incorporating it into SQL queries. This allows an attacker with administrative privileges to manipulate the database through crafted input values.

The vulnerability is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command) and CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component). The attack requires network access and high privileges (administrative account), but no user interaction is needed for exploitation.

Root Cause

The root cause of this vulnerability is the direct use of user-controlled input in SQL queries without proper parameterization or input sanitization. The ID parameter from the manage-doctors.php endpoint is concatenated directly into SQL statements, allowing attackers to break out of the intended query context and execute arbitrary SQL commands.

PHP applications that use dynamic SQL query construction without prepared statements or parameterized queries are inherently vulnerable to this type of injection attack. The Hospital Management System appears to lack proper input validation mechanisms that would prevent malicious characters from being interpreted as SQL syntax.

Attack Vector

The attack can be performed remotely over the network by an authenticated administrator. The attacker would craft a malicious HTTP request to the /hms/admin/manage-doctors.php endpoint with a specially crafted ID parameter containing SQL injection payloads.

The vulnerability allows for extraction of sensitive data (confidentiality impact), modification of database records (integrity impact), and potential disruption of database availability. Since this is a hospital management system, exploited data could include patient medical records, doctor credentials, appointment schedules, and billing information.

A proof-of-concept for this vulnerability has been publicly disclosed. For technical details, refer to the GitHub PoC Repository and the VulDB entry #344769.

Detection Methods for CVE-2026-2134

Indicators of Compromise

• Unusual SQL error messages in web server logs referencing manage-doctors.php
• HTTP requests to /hms/admin/manage-doctors.php containing SQL metacharacters (single quotes, semicolons, UNION statements) in the ID parameter
• Database audit logs showing unexpected SELECT, INSERT, UPDATE, or DELETE operations from the web application user
• Abnormal data extraction patterns or bulk record access from the doctors table

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect SQL injection patterns in requests to the Hospital Management System
• Monitor application logs for requests containing SQL keywords (UNION, SELECT, INSERT, DROP, etc.) in URL parameters
• Deploy database activity monitoring to alert on anomalous query patterns or unauthorized data access
• Configure intrusion detection systems with signatures for known SQL injection attack patterns

Monitoring Recommendations

• Enable detailed logging for all administrative actions in the Hospital Management System
• Set up real-time alerting for failed SQL queries or database errors that may indicate injection attempts
• Implement session monitoring to detect compromised administrative accounts being used for exploitation
• Review web server access logs regularly for suspicious patterns targeting manage-doctors.php

How to Mitigate CVE-2026-2134

Immediate Actions Required

• Restrict network access to the Hospital Management System administrative interface to trusted IP addresses only
• Implement a Web Application Firewall (WAF) with SQL injection protection rules
• Review and audit all administrative accounts for unauthorized access or suspicious activity
• Consider taking the affected endpoint offline until a patch is available

Patch Information

As of the last update on 2026-02-11, no official vendor patch has been released for this vulnerability. Organizations using PHPGurukul Hospital Management System 4.0 should monitor the PHP Gurukul Homepage for security updates and patches.

In the absence of an official fix, organizations should implement the workarounds listed below and consider custom code modifications to add proper input validation and parameterized queries to the affected functionality.

Workarounds

• Implement prepared statements with parameterized queries for all database interactions in the affected file
• Add server-side input validation to sanitize the ID parameter, allowing only numeric values
• Deploy a Web Application Firewall configured to block SQL injection attack patterns
• Restrict access to the administrative interface using network-level access controls or VPN requirements
• Consider upgrading to a more actively maintained hospital management system if patches are not forthcoming

# Configuration example - Apache mod_security rule to block SQL injection
# Add to your Apache configuration or .htaccess file
SecRule REQUEST_URI "/hms/admin/manage-doctors.php" \
    "id:100001,phase:2,deny,status:403,\
    chain"
SecRule ARGS:ID "!^[0-9]+$" \
    "msg:'SQL Injection attempt blocked on manage-doctors.php'"