CVE-2026-26890: Pharmacy Point Of Sale System SQLi Flaw

CVE-2026-26890 Overview

A SQL Injection vulnerability has been identified in Sourcecodester Pharmacy Point of Sale System version 1.0. The vulnerability exists in the /pharmacy/manage_product.php endpoint, allowing authenticated attackers with administrative privileges to inject malicious SQL statements through specially crafted requests. This flaw enables unauthorized read access to sensitive database information.

Critical Impact

Authenticated attackers with high privileges can extract sensitive data from the database through SQL Injection attacks on the product management functionality.

Affected Products

• Sourcecodester Pharmacy Point of Sale System v1.0
• oretnom23 pharmacy_point_of_sale_system 1.0

Discovery Timeline

• 2026-03-03 - CVE-2026-26890 published to NVD
• 2026-03-04 - Last updated in NVD database

Technical Details for CVE-2026-26890

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) affects the Sourcecodester Pharmacy Point of Sale System, specifically within the /pharmacy/manage_product.php file. The vulnerability stems from improper neutralization of special elements used in SQL commands, allowing an attacker to manipulate database queries.

The attack requires network access and high-level privileges (administrator access), but once these conditions are met, exploitation can be performed without user interaction. The vulnerability enables unauthorized read access to confidential database information, though it does not allow data modification or service disruption.

Root Cause

The root cause of this vulnerability is insufficient input validation and lack of parameterized queries in the manage_product.php file. User-supplied input is directly concatenated into SQL statements without proper sanitization or the use of prepared statements, allowing attackers to inject arbitrary SQL code that will be executed by the database engine.

Attack Vector

The attack is conducted over the network against the web application's product management interface. An authenticated attacker with administrative privileges can craft malicious HTTP requests containing SQL injection payloads targeting the vulnerable endpoint. The injected SQL commands are then executed against the backend database, potentially exposing sensitive information such as user credentials, customer data, or pharmacy inventory details.

The vulnerability can be exploited by manipulating parameters sent to /pharmacy/manage_product.php. For detailed technical analysis of the SQL injection mechanism, refer to the GitHub SQL Injection Analysis provided by the security researcher.

Detection Methods for CVE-2026-26890

Indicators of Compromise

• Unusual or malformed SQL syntax appearing in web server access logs for /pharmacy/manage_product.php
• Database query logs showing unexpected UNION SELECT, OR 1=1, or other SQL injection patterns
• Abnormal database read operations or data extraction from the pharmacy system
• Error messages in application logs indicating SQL syntax errors or database exceptions

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block common SQL injection patterns targeting the vulnerable endpoint
• Implement database activity monitoring to identify suspicious query patterns or unauthorized data access
• Configure intrusion detection systems (IDS) to alert on SQL injection attack signatures in HTTP traffic
• Enable detailed logging for the /pharmacy/manage_product.php endpoint and monitor for anomalous request patterns

Monitoring Recommendations

• Monitor web server access logs for requests to manage_product.php containing SQL metacharacters such as single quotes, semicolons, or comment sequences
• Implement real-time alerting for database queries that deviate from expected application behavior
• Conduct regular log analysis to identify patterns consistent with SQL injection reconnaissance or exploitation attempts

How to Mitigate CVE-2026-26890

Immediate Actions Required

• Restrict network access to the vulnerable /pharmacy/manage_product.php endpoint to trusted IP addresses only
• Implement additional authentication controls to limit administrative access
• Deploy a Web Application Firewall with SQL injection prevention rules as a temporary protective measure
• Review and audit all user accounts with administrative privileges to ensure principle of least privilege

Patch Information

No official vendor patch has been released for this vulnerability. The Sourcecodester Pharmacy Point of Sale System is an open-source project, and users should monitor the project repository and security advisories for updates. Organizations using this software should consider implementing the workarounds below or migrating to a more secure alternative solution.

Workarounds

• Modify the manage_product.php file to use prepared statements with parameterized queries instead of string concatenation for all database operations
• Implement strict input validation and sanitization for all user-supplied data before processing
• Deploy a reverse proxy or WAF in front of the application to filter malicious SQL injection attempts
• Consider taking the affected endpoint offline or restricting access until a proper fix can be implemented
• Conduct a comprehensive code review of the entire application to identify and remediate similar SQL injection vulnerabilities

# Example WAF rule to block SQL injection attempts (ModSecurity)
SecRule ARGS "@detectSQLi" "id:1001,phase:2,deny,status:403,msg:'SQL Injection Detected'"
SecRule REQUEST_URI "/pharmacy/manage_product.php" "chain,id:1002,phase:2,deny,status:403"
SecRule ARGS "@rx (?i)(union|select|insert|update|delete|drop|--|;)" "msg:'SQL Keywords Blocked'"