CVE-2026-26707: Pharmacy Point Of Sale System SQLi Flaw

CVE-2026-26707 Overview

CVE-2026-26707 is a SQL Injection vulnerability affecting the Pharmacy Point of Sale System version 1.0 developed by oretnom23 (SourceCodester). The vulnerability exists in the /pharmacy/view_supplier.php endpoint, allowing unauthenticated attackers to manipulate SQL queries and potentially compromise the entire database backend.

Critical Impact

This SQL Injection vulnerability allows remote attackers to execute arbitrary SQL commands without authentication, potentially leading to complete database compromise, data exfiltration, and unauthorized access to sensitive pharmacy and customer records.

Affected Products

• Oretnom23 Pharmacy Point of Sale System version 1.0
• SourceCodester Pharmacy Point of Sale System v1.0

Discovery Timeline

• 2026-03-02 - CVE-2026-26707 published to NVD
• 2026-03-03 - Last updated in NVD database

Technical Details for CVE-2026-26707

Vulnerability Analysis

This vulnerability is classified as SQL Injection (CWE-89: Improper Neutralization of Special Elements used in an SQL Command). The flaw exists in the view_supplier.php file within the pharmacy application, where user-supplied input is directly incorporated into SQL queries without proper sanitization or parameterization.

The vulnerability allows attackers to inject malicious SQL statements through the web interface, enabling them to bypass authentication mechanisms, extract sensitive data from the database, modify or delete records, and potentially execute system-level commands depending on the database configuration and privileges.

Root Cause

The root cause of CVE-2026-26707 is the failure to implement proper input validation and parameterized queries in the view_supplier.php endpoint. User-supplied parameters are directly concatenated into SQL query strings without sanitization, allowing attackers to break out of the intended query structure and inject arbitrary SQL commands.

Attack Vector

The attack vector is network-based and requires no authentication or user interaction. An attacker can exploit this vulnerability by sending specially crafted HTTP requests to the /pharmacy/view_supplier.php endpoint. The malicious input is then processed by the backend PHP code and executed against the database.

The vulnerability can be exploited through standard SQL injection techniques including UNION-based injection for data extraction, boolean-based blind injection for inference attacks, and time-based blind injection when direct output is not available. Technical details and proof-of-concept information can be found in the GitHub Bug Report.

Detection Methods for CVE-2026-26707

Indicators of Compromise

• Unusual or malformed HTTP requests to /pharmacy/view_supplier.php containing SQL syntax characters such as single quotes, semicolons, or UNION statements
• Database error messages appearing in application logs or responses indicating SQL syntax errors
• Unexpected database queries or data access patterns in database audit logs
• Signs of data exfiltration or unauthorized bulk data retrieval from supplier-related tables

Detection Strategies

• Deploy web application firewalls (WAF) with SQL injection detection rules targeting the affected endpoint
• Implement database activity monitoring to detect anomalous query patterns and unauthorized data access
• Enable detailed logging for the /pharmacy/view_supplier.php endpoint and analyze for injection attempts
• Use intrusion detection systems with signatures for common SQL injection payloads

Monitoring Recommendations

• Monitor HTTP request logs for suspicious parameter values containing SQL metacharacters
• Set up alerts for database errors related to malformed SQL queries
• Track and baseline normal database query patterns to identify anomalous activity
• Review access logs for repeated requests to view_supplier.php from single IP addresses

How to Mitigate CVE-2026-26707

Immediate Actions Required

• Restrict network access to the Pharmacy Point of Sale System to trusted IP addresses only
• Consider taking the application offline until a patch is available or code remediation is complete
• Implement a web application firewall with strict SQL injection filtering rules
• Enable database auditing and monitor for suspicious query activity

Patch Information

As of the last NVD update on 2026-03-03, no official vendor patch has been released for this vulnerability. Organizations should monitor the vendor's official channels and the GitHub repository for updates regarding security fixes. Given the critical nature of this vulnerability and the lack of an official patch, implementing workarounds and compensating controls is strongly recommended.

Workarounds

• Deploy a web application firewall (WAF) in front of the application to filter SQL injection attempts
• Restrict access to the application through network segmentation and firewall rules
• Manually review and modify the view_supplier.php source code to implement prepared statements with parameterized queries
• Implement input validation at the application level to whitelist expected parameter formats

# Example: Restrict access to the pharmacy application using iptables
# Allow only trusted internal network to access the application
iptables -A INPUT -p tcp --dport 80 -s 192.168.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP

# Example: Apache mod_rewrite rule to block common SQL injection patterns
# Add to .htaccess in the pharmacy directory
RewriteEngine On
RewriteCond %{QUERY_STRING} (\%27|\'|\%22|\"|\%2D\%2D|--|\%3B|;|\%3D|=) [NC]
RewriteRule ^pharmacy/view_supplier\.php$ - [F,L]