CVE-2026-7392: Pharmacy Sales & Inventory System SQLi

CVE-2026-7392 Overview

A SQL injection vulnerability has been identified in SourceCodester Pharmacy Sales and Inventory System version 1.0. This vulnerability impacts the delete_supplier function within the file /ajax.php?action=delete_supplier. Improper handling of the ID argument allows attackers to inject malicious SQL commands, potentially compromising the integrity and confidentiality of the underlying database. The attack can be executed remotely by authenticated users, and exploit details have been publicly disclosed.

Critical Impact

Authenticated attackers can exploit the SQL injection flaw to manipulate database queries, potentially leading to unauthorized data access, modification, or deletion of sensitive pharmacy records.

Affected Products

• SourceCodester Pharmacy Sales and Inventory System 1.0

Discovery Timeline

• 2026-04-29 - CVE-2026-7392 published to NVD
• 2026-04-29 - Last updated in NVD database

Technical Details for CVE-2026-7392

Vulnerability Analysis

This SQL injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) occurs in the supplier deletion functionality of the Pharmacy Sales and Inventory System. The delete_supplier function fails to properly sanitize the ID parameter before incorporating it into SQL queries. This allows an authenticated attacker to craft malicious input that alters the intended SQL command structure, potentially bypassing security controls and directly interacting with the database backend.

The vulnerability is accessible over the network and requires low-privilege authentication. An attacker with basic user credentials can exploit this flaw without any user interaction, making it a viable target for automated exploitation attempts.

Root Cause

The root cause is insufficient input validation and lack of parameterized queries in the delete_supplier function. When the ID argument is passed to /ajax.php?action=delete_supplier, it is directly concatenated into the SQL query string without proper sanitization or the use of prepared statements. This classic SQL injection pattern allows attackers to inject arbitrary SQL syntax through the vulnerable parameter.

Attack Vector

The attack vector is network-based, requiring an attacker to send a crafted HTTP request to the vulnerable endpoint. The exploitation flow involves:

1. Authenticating to the Pharmacy Sales and Inventory System with valid credentials
2. Sending a malicious request to /ajax.php?action=delete_supplier with a crafted ID parameter
3. The injected SQL payload executes within the context of the database connection
4. The attacker can extract data, modify records, or perform other database operations depending on the database permissions

The vulnerability can be exploited by manipulating the ID parameter to include SQL metacharacters and additional SQL statements. For example, an attacker could append UNION-based or boolean-based injection payloads to enumerate database contents. For detailed technical analysis and proof-of-concept information, refer to the GitHub Issue Report and VulDB entry #360117.

Detection Methods for CVE-2026-7392

Indicators of Compromise

• Unusual database query patterns or errors in application logs related to the delete_supplier action
• HTTP requests to /ajax.php?action=delete_supplier containing SQL metacharacters such as single quotes, semicolons, or UNION keywords in the ID parameter
• Unexpected database modifications or data exfiltration activity
• Authentication logs showing repeated access attempts followed by suspicious API calls

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect SQL injection patterns in requests to /ajax.php
• Monitor application logs for SQL syntax errors that may indicate injection attempts
• Deploy database activity monitoring to identify anomalous queries originating from the web application
• Use intrusion detection systems (IDS) with signatures for common SQL injection attack patterns

Monitoring Recommendations

• Enable detailed logging for all requests to the /ajax.php endpoint
• Configure alerting for requests containing SQL injection indicators in the ID parameter
• Monitor database audit logs for unauthorized SELECT, UPDATE, or DELETE operations
• Review authentication logs for accounts making repeated requests to the vulnerable endpoint

How to Mitigate CVE-2026-7392

Immediate Actions Required

• Restrict access to the Pharmacy Sales and Inventory System to trusted networks only
• Implement Web Application Firewall rules to block requests containing SQL injection payloads
• Review and limit database user privileges for the application to minimum required permissions
• Consider disabling the delete_supplier functionality until a patch is applied

Patch Information

No official vendor patch has been identified at this time. Organizations using SourceCodester Pharmacy Sales and Inventory System 1.0 should monitor the SourceCodester website for security updates. Additional vulnerability details are available at the VulDB submission #803107.

Workarounds

• Implement input validation on the ID parameter to accept only numeric values
• Deploy a WAF with SQL injection protection rules as a defense-in-depth measure
• Use parameterized queries or prepared statements if modifying the source code is possible
• Isolate the application from sensitive network segments until a permanent fix is available

# Example WAF rule to block SQL injection in the ID parameter (ModSecurity)
SecRule ARGS:ID "@detectSQLi" "id:1001,phase:2,deny,status:403,msg:'SQL Injection attempt blocked on delete_supplier'"