CVE-2026-7128: Pharmacy Sales System SQL Injection Flaw

CVE-2026-7128 Overview

A SQL injection vulnerability has been identified in SourceCodester Pharmacy Sales and Inventory System 1.0. This issue affects processing of the file /ajax.php?action=save_type, where manipulation of the ID argument enables SQL injection attacks. The vulnerability can be exploited remotely over the network, and the exploit has been disclosed publicly.

Critical Impact
Remote attackers can exploit this SQL injection flaw to manipulate database queries, potentially leading to unauthorized data access, data modification, or complete database compromise in pharmacy management systems.

Affected Products

SourceCodester Pharmacy Sales and Inventory System 1.0
Web applications using the vulnerable /ajax.php?action=save_type endpoint

Discovery Timeline

2026-04-27 - CVE CVE-2026-7128 published to NVD
2026-04-29 - Last updated in NVD database

Technical Details for CVE-2026-7128

Vulnerability Analysis

This SQL injection vulnerability exists in the SourceCodester Pharmacy Sales and Inventory System, specifically within the /ajax.php file when processing the save_type action. The ID parameter is not properly sanitized before being incorporated into SQL queries, allowing attackers to inject malicious SQL statements.

The vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), which encompasses injection flaws where user-controlled input is not properly validated before being used in commands or queries.

Since the exploit has been publicly disclosed, organizations running this pharmacy management software face immediate risk of exploitation from attackers who can craft malicious requests targeting the vulnerable endpoint.

Root Cause

The root cause of this vulnerability is insufficient input validation and lack of parameterized queries in the /ajax.php file. When processing the save_type action, the application directly incorporates the user-supplied ID parameter into SQL queries without proper sanitization or the use of prepared statements. This allows attackers to break out of the intended query structure and inject arbitrary SQL commands.

Attack Vector

The attack vector is network-based, allowing remote exploitation without authentication requirements. An attacker can send specially crafted HTTP requests to the /ajax.php?action=save_type endpoint with a malicious ID parameter value containing SQL injection payloads. The vulnerability manipulation allows attackers to potentially extract sensitive pharmacy data, modify inventory records, or escalate to broader database access depending on database permissions.

For detailed technical information about this vulnerability, refer to the GitHub Issue #13 or the VulDB Vulnerability Entry #359727.

Detection Methods for CVE-2026-7128

Indicators of Compromise

Unusual SQL error messages in web server logs related to /ajax.php?action=save_type
HTTP requests to /ajax.php containing SQL syntax characters such as single quotes, double dashes, or UNION keywords in the ID parameter
Database query logs showing unexpected SELECT, UPDATE, DELETE, or UNION operations originating from the pharmacy application
Unexpected data modifications in pharmacy inventory or sales records

Detection Strategies

Implement web application firewall (WAF) rules to detect and block SQL injection patterns targeting the /ajax.php endpoint
Monitor HTTP access logs for requests containing common SQL injection payloads in URL parameters
Deploy intrusion detection systems (IDS) with signatures for SQL injection attack patterns
Enable database audit logging to detect anomalous query patterns or unauthorized data access

Monitoring Recommendations

Configure real-time alerting for SQL injection signatures in network traffic to the pharmacy application
Monitor database connection logs for unusual query volumes or error rates from the web application
Review web server logs regularly for repeated failed requests that may indicate reconnaissance or attack attempts
Implement application-level logging to track parameter values passed to database queries

How to Mitigate CVE-2026-7128

Immediate Actions Required

Restrict network access to the SourceCodester Pharmacy Sales and Inventory System to trusted IP addresses only
Deploy a web application firewall (WAF) with SQL injection protection rules in front of the application
Review and audit database permissions to ensure the application uses least-privilege access
Consider taking the application offline until a patch is available if it contains sensitive data

Patch Information

No official patch information is currently available from the vendor. Organizations should monitor SourceCodester for security updates. Additional vulnerability details and community discussion can be found at VulDB Submission #800973.

Workarounds

Implement input validation on the ID parameter to accept only numeric values before processing
Deploy a reverse proxy or WAF that sanitizes SQL injection payloads from incoming requests
Modify the vulnerable code to use parameterized queries or prepared statements instead of string concatenation
Limit database user permissions to minimize the impact of successful SQL injection attacks
Consider network segmentation to isolate the pharmacy system from critical infrastructure

bash

# Example WAF rule to block SQL injection in ID parameter (ModSecurity)
SecRule ARGS:ID "@detectSQLi" \
    "id:1001,\
    phase:2,\
    deny,\
    log,\
    msg:'SQL Injection detected in ID parameter',\
    tag:'CVE-2026-7128'"