CVE-2026-1198: SIMPLE.ERP SQL Injection Vulnerability

CVE-2026-1198 Overview

SIMPLE.ERP contains an SQL Injection vulnerability in the search functionality within the "Obroty na kontach" (Account Turnover) window. Due to a lack of proper input validation, an authenticated attacker can craft and execute malicious SQL queries against the underlying database. This vulnerability allows attackers to potentially extract sensitive financial and business data, modify database records, or escalate their access within the ERP system.

Critical Impact

Authenticated attackers can exploit the SQL Injection vulnerability to access, modify, or exfiltrate sensitive enterprise data stored in the SIMPLE.ERP database, potentially compromising financial records and business-critical information.

Affected Products

• SIMPLE.ERP versions prior to 6.30@A04.4_u06

Discovery Timeline

• 2026-02-26 - CVE CVE-2026-1198 published to NVD
• 2026-02-26 - Last updated in NVD database

Technical Details for CVE-2026-1198

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) exists in the search functionality of SIMPLE.ERP's "Obroty na kontach" window. The application fails to properly validate or sanitize user-supplied input before incorporating it into SQL queries. When an authenticated user submits search parameters, these values are concatenated directly into database queries without parameterization or escaping, enabling attackers to inject arbitrary SQL commands.

The network-accessible nature of this vulnerability combined with the low attack complexity makes it particularly dangerous in enterprise environments where SIMPLE.ERP manages critical financial data. While authentication is required, any user with valid credentials can potentially exploit this flaw to exceed their authorized data access.

Root Cause

The root cause of this vulnerability is improper input validation (CWE-89: Improper Neutralization of Special Elements used in an SQL Command). The search functionality in the "Obroty na kontach" window directly incorporates user input into SQL queries without using parameterized queries or prepared statements. This allows special SQL characters and syntax to be interpreted as part of the query structure rather than as literal data values.

Attack Vector

The attack vector is network-based, requiring the attacker to have authenticated access to the SIMPLE.ERP application. Once authenticated, the attacker can navigate to the "Obroty na kontach" window and inject malicious SQL payloads through the search input fields. These payloads can include UNION-based attacks to extract data from other tables, boolean-based blind injection to enumerate database contents, or time-based attacks to infer information from application response times.

The vulnerability allows attackers to achieve high confidentiality and integrity impact on the vulnerable system, potentially accessing sensitive financial records, customer data, and business information stored in the ERP database.

Detection Methods for CVE-2026-1198

Indicators of Compromise

• Unusual or malformed search queries in SIMPLE.ERP application logs containing SQL syntax such as UNION SELECT, OR 1=1, or comment sequences (--, /*)
• Database query logs showing unexpected queries from the "Obroty na kontach" functionality accessing tables outside normal scope
• Abnormal data access patterns from authenticated users, particularly bulk data extraction or access to unauthorized records
• Error messages in application logs indicating SQL syntax errors that could suggest failed injection attempts

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common SQL injection patterns in HTTP requests to SIMPLE.ERP
• Enable detailed database query logging and monitor for anomalous query patterns, especially those containing SQL keywords in search parameters
• Deploy database activity monitoring (DAM) solutions to alert on unusual data access patterns or queries that access sensitive tables
• Configure SentinelOne Singularity Platform to monitor for suspicious database-related process activity and network communications

Monitoring Recommendations

• Monitor SIMPLE.ERP application logs for search queries containing SQL metacharacters or injection payloads
• Set up alerts for database errors related to malformed queries originating from the search functionality
• Track user behavior analytics to identify authenticated users accessing data volumes inconsistent with their normal patterns
• Review audit logs for any unauthorized data access or modification events following search activity

How to Mitigate CVE-2026-1198

Immediate Actions Required

• Update SIMPLE.ERP to version 6.30@A04.4_u06 or later, which contains the security fix for this vulnerability
• Audit existing user accounts and enforce principle of least privilege to minimize the impact of potential exploitation
• Review database access logs for any indicators of prior exploitation attempts
• Implement network segmentation to limit access to the SIMPLE.ERP application and its underlying database

Patch Information

The vendor has released a patch addressing this SQL Injection vulnerability in SIMPLE.ERP version 6.30@A04.4_u06. Organizations should prioritize applying this update to all affected SIMPLE.ERP installations. For additional information, refer to the CERT Security Advisory and the vendor's website.

Workarounds

• If immediate patching is not possible, implement a Web Application Firewall (WAF) with SQL injection filtering rules in front of the SIMPLE.ERP application
• Restrict network access to the SIMPLE.ERP application to only trusted IP ranges and authorized users
• Disable or limit access to the "Obroty na kontach" search functionality until the patch can be applied
• Implement database-level query restrictions and monitoring to detect and prevent unauthorized data access