CVE-2026-26888: Pharmacy Point Of Sale System SQLi Flaw

CVE-2026-26888 Overview

A SQL Injection vulnerability has been identified in Sourcecodester Pharmacy Point of Sale System v1.0. The vulnerability exists in the /pharmacy/manage_stock.php endpoint, allowing authenticated attackers with high privileges to inject malicious SQL queries and potentially extract sensitive information from the database.

Critical Impact

Authenticated attackers can exploit this SQL Injection flaw to read confidential database contents, potentially exposing patient information, medication records, and other sensitive pharmacy data stored in the backend database.

Affected Products

• Oretnom23 Pharmacy Point Of Sale System v1.0
• Systems running /pharmacy/manage_stock.php endpoint

Discovery Timeline

• 2026-03-03 - CVE-2026-26888 published to NVD
• 2026-03-04 - Last updated in NVD database

Technical Details for CVE-2026-26888

Vulnerability Analysis

This vulnerability is classified as CWE-89 (SQL Injection), a critical web application security flaw that occurs when user-supplied input is improperly handled before being incorporated into SQL queries. In the context of Pharmacy Point of Sale System v1.0, the manage_stock.php script fails to properly sanitize or parameterize user input, enabling attackers to manipulate database queries.

While the attack requires network access and high-level privileges (such as administrator credentials), successful exploitation allows unauthorized read access to confidential database information. The impact is limited to confidentiality, as the vulnerability does not enable data modification or system disruption based on the assessed characteristics.

Root Cause

The root cause of this vulnerability is improper input validation and the lack of parameterized queries in the manage_stock.php file. User-controlled input is directly concatenated into SQL statements without adequate sanitization, escaping, or the use of prepared statements. This coding practice allows malicious SQL syntax to be interpreted by the database engine as legitimate query commands.

Attack Vector

The attack is executed remotely over the network by an authenticated user with elevated privileges. The attacker sends specially crafted input through the manage_stock.php endpoint, injecting SQL commands that alter the intended query logic. This enables unauthorized data retrieval from the database, potentially exposing sensitive pharmacy records, user credentials, and other confidential information.

The vulnerability mechanism involves unsanitized parameters being passed to SQL queries within the stock management functionality. When an attacker supplies malicious input containing SQL metacharacters and commands, the backend database interprets these as part of the query structure rather than as data values. For detailed technical information about the exploitation method, refer to the GitHub SQL Injection Report.

Detection Methods for CVE-2026-26888

Indicators of Compromise

• Unusual SQL error messages appearing in application logs from manage_stock.php
• Database query logs showing unexpected UNION SELECT, OR 1=1, or other SQL injection patterns
• Access logs indicating repeated requests to /pharmacy/manage_stock.php with unusual parameters
• Evidence of data exfiltration or unauthorized database access by privileged accounts

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect SQL injection patterns targeting the manage_stock.php endpoint
• Deploy database activity monitoring to identify anomalous queries originating from the pharmacy application
• Configure intrusion detection systems (IDS) to alert on SQL injection attack signatures
• Review application logs for error messages indicating failed SQL injection attempts

Monitoring Recommendations

• Enable verbose logging for the Pharmacy Point of Sale System application and database
• Monitor network traffic to and from the application server for suspicious payloads
• Implement real-time alerting for any SQL-related errors or anomalies from the manage_stock.php script
• Conduct periodic security audits and code reviews of the stock management functionality

How to Mitigate CVE-2026-26888

Immediate Actions Required

• Restrict access to /pharmacy/manage_stock.php to only essential administrative personnel
• Implement Web Application Firewall (WAF) rules to block common SQL injection patterns
• Review and limit database privileges for the application service account
• Consider temporarily disabling the vulnerable endpoint until a patch is applied

Patch Information

No official vendor patch is currently available for this vulnerability. The affected software, Sourcecodester Pharmacy Point of Sale System v1.0, is developed by oretnom23. Organizations should monitor the vendor's release channels for security updates. In the absence of an official fix, applying the workarounds and security controls listed below is essential.

Workarounds

• Implement prepared statements and parameterized queries for all database interactions in manage_stock.php
• Deploy input validation to reject unexpected characters and enforce strict data types
• Use a Web Application Firewall (WAF) with SQL injection detection rules
• Apply the principle of least privilege to database accounts used by the application

# Example: Restrict access to vulnerable endpoint via Apache .htaccess
<Files "manage_stock.php">
    Order deny,allow
    Deny from all
    Allow from 192.168.1.0/24
</Files>