CVE-2026-26889: Pharmacy Point Of Sale System SQLi Flaw

CVE-2026-26889 Overview

CVE-2026-26889 is a SQL Injection vulnerability affecting Sourcecodester Pharmacy Point of Sale System v1.0. The vulnerability exists in the /pharmacy/manage_category.php endpoint, allowing attackers with high privileges to inject malicious SQL commands and potentially extract sensitive information from the underlying database.

Critical Impact

SQL Injection vulnerability enabling unauthorized database access in pharmacy management systems, potentially exposing patient records and medication inventory data.

Affected Products

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

Discovery Timeline

• 2026-03-03 - CVE CVE-2026-26889 published to NVD
• 2026-03-04 - Last updated in NVD database

Technical Details for CVE-2026-26889

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) resides in the manage_category.php file of the Pharmacy Point of Sale System. The application fails to properly sanitize user-supplied input before incorporating it into SQL queries, creating an injection point that can be exploited to manipulate database operations. While the vulnerability requires high privileges to exploit (administrative access), successful exploitation could lead to unauthorized disclosure of confidential information stored in the pharmacy database, including potentially sensitive customer and inventory data.

Root Cause

The root cause of this vulnerability is improper input validation and the lack of parameterized queries in the manage_category.php component. The application directly concatenates user input into SQL statements without adequate sanitization or the use of prepared statements, allowing attackers to inject arbitrary SQL syntax into the query structure.

Attack Vector

The attack is network-based, requiring the attacker to have authenticated access with high-level privileges to the application's administrative interface. An attacker with administrative credentials can craft malicious input containing SQL metacharacters and inject them through the vulnerable manage_category.php endpoint. The injected SQL commands are then executed by the database server, potentially allowing the attacker to read confidential data from the database.

The vulnerability can be exploited by submitting specially crafted requests to the /pharmacy/manage_category.php endpoint with malicious SQL payloads embedded in vulnerable parameters. Due to the lack of input sanitization, these payloads are processed directly by the database, enabling data exfiltration. For detailed technical information about the exploitation method, refer to the GitHub SQL Injection Report.

Detection Methods for CVE-2026-26889

Indicators of Compromise

• Unusual database query patterns in application logs containing SQL keywords like UNION, SELECT, OR 1=1, or comment sequences
• Multiple requests to /pharmacy/manage_category.php with suspicious parameter values containing SQL metacharacters
• Database errors appearing in web server logs indicating malformed SQL queries
• Unexpected data access patterns from administrative accounts

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in HTTP requests
• Enable database query logging and monitor for anomalous query structures targeting the pharmacy database
• Implement application-layer intrusion detection to identify SQL injection attempts in the manage_category.php endpoint
• Review access logs for suspicious activity from privileged accounts accessing category management functions

Monitoring Recommendations

• Configure alerts for database errors that may indicate SQL injection attempts
• Monitor administrative session activity for unusual patterns or high-volume requests to the vulnerable endpoint
• Implement real-time log analysis to detect SQL injection signatures in HTTP parameters
• Establish baseline behavior for the manage_category.php functionality to identify deviations

How to Mitigate CVE-2026-26889

Immediate Actions Required

• Restrict access to the /pharmacy/manage_category.php endpoint to only trusted administrators
• Implement network-level access controls to limit exposure of the application to untrusted networks
• Deploy a Web Application Firewall with SQL injection protection rules
• Review and audit administrative account access and credentials

Patch Information

No official vendor patch information is currently available from Sourcecodester. Organizations should monitor the application's official channels for security updates. Given that this is a Sourcecodester application, users should consider reaching out to the developer community or implementing compensating controls until an official fix is released. For additional context on the vulnerability, see the GitHub SQL Injection Report.

Workarounds

• Implement input validation on the server side to reject SQL metacharacters and dangerous patterns before processing
• Use parameterized queries or prepared statements when modifying the application code
• Deploy a reverse proxy with SQL injection filtering capabilities in front of the application
• Consider isolating the pharmacy system on a segmented network with restricted access

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