CVE-2026-32888: Point of Sale SQLi Vulnerability

CVE-2026-32888 Overview

CVE-2026-32888 is a SQL Injection vulnerability affecting Open Source Point of Sale (OSPOS), a web-based point-of-sale application built with PHP and the CodeIgniter framework. The vulnerability exists in the Items search functionality when the custom attribute search feature is enabled. User-supplied input from the search GET parameter is interpolated directly into a HAVING clause without parameterization or sanitization, allowing authenticated attackers with basic item search permissions to execute arbitrary SQL queries against the underlying database.

Critical Impact

Authenticated attackers can exploit this SQL Injection vulnerability to extract sensitive data, modify database contents, or potentially achieve full database compromise through the Items search functionality.

Affected Products

• Open Source Point of Sale (OSPOS) - All versions with custom attribute search feature enabled
• CodeIgniter-based OSPOS deployments with search_custom filter active

Discovery Timeline

• 2026-03-20 - CVE CVE-2026-32888 published to NVD
• 2026-03-20 - Last updated in NVD database

Technical Details for CVE-2026-32888

Vulnerability Analysis

This vulnerability is classified as CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). The flaw occurs when the search_custom filter is enabled in the Items search functionality. When a user performs a search, the application takes the value from the search GET parameter and directly concatenates it into a SQL HAVING clause without any form of input sanitization, parameterization, or prepared statement usage.

The lack of proper input validation allows attackers to break out of the intended SQL query structure and inject malicious SQL statements. Since the injection point is within a HAVING clause, attackers can leverage various SQL techniques to extract data, modify records, or enumerate database schema information.

Root Cause

The root cause of this vulnerability is the direct interpolation of user-controlled input into SQL queries without proper escaping or parameterized queries. The CodeIgniter framework provides built-in mechanisms for query binding and Active Record patterns that would prevent this type of injection, but the vulnerable code bypasses these security controls by using raw string concatenation in the HAVING clause construction.

Attack Vector

The attack is network-based and requires authentication with basic item search permissions. An attacker can craft malicious search queries through the search GET parameter when the search_custom filter is active. The vulnerability can be exploited through standard HTTP GET requests to the Items search endpoint.

The exploitation mechanism involves injecting SQL syntax into the search parameter that alters the logic of the HAVING clause. Attackers can use techniques such as UNION-based injection, boolean-based blind injection, or time-based blind injection depending on database configuration and error handling. For detailed technical information and proof-of-concept examples, refer to the GitHub Security Advisory.

Detection Methods for CVE-2026-32888

Indicators of Compromise

• Unusual or malformed search queries in web server access logs containing SQL syntax characters such as single quotes, double dashes, or UNION statements
• Increased database query execution times or errors in database logs
• Access log entries with encoded SQL injection payloads targeting the Items search endpoint with search_custom parameter
• Database audit logs showing unexpected data access patterns or schema enumeration queries

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block SQL injection patterns in GET parameters
• Monitor application logs for search queries containing SQL keywords like UNION, SELECT, DROP, INSERT, or comment sequences
• Deploy database activity monitoring to detect anomalous query patterns from the application user account
• Use intrusion detection systems (IDS) with signatures for common SQL injection attack patterns

Monitoring Recommendations

• Enable verbose logging for the Items search functionality to capture all search queries
• Configure database query logging to track all queries executed through the application connection
• Set up alerts for authentication failures followed by successful searches with unusual patterns
• Monitor for bulk data extraction patterns that may indicate successful exploitation

How to Mitigate CVE-2026-32888

Immediate Actions Required

• Disable the custom attribute search feature (search_custom filter) until a patch is available
• Implement input validation at the web server or WAF level to filter SQL injection patterns
• Restrict access to the Items search functionality to only trusted users
• Review and audit access logs for potential exploitation attempts

Patch Information

A patch did not exist at the time of publication. Organizations should monitor the GitHub Security Advisory for updates regarding an official fix. Until a patch is released, implementing the recommended workarounds is critical for maintaining security posture.

Workarounds

• Disable the search_custom filter in application configuration to prevent exploitation through this vector
• Implement a web application firewall with SQL injection detection rules in front of the OSPOS application
• Apply network segmentation to limit which users can access the point-of-sale application
• Consider implementing additional authentication controls such as IP whitelisting for administrative functions
• Deploy runtime application self-protection (RASP) solutions capable of detecting and blocking SQL injection attempts

# Example: Disable custom attribute search in configuration
# Locate the application configuration file and set:
# $config['search_custom'] = FALSE;

# WAF rule example (ModSecurity):
SecRule ARGS:search "@detectSQLi" "id:1001,phase:2,deny,status:403,msg:'SQL Injection Attempt Blocked'"