CVE-2026-1178: Yonyou KSOA 9.0 SQL Injection Vulnerability

CVE-2026-1178 Overview

A SQL injection vulnerability has been identified in Yonyou KSOA 9.0 affecting the /kmf/select.jsp file within the HTTP GET Parameter Handler component. The vulnerability occurs due to improper sanitization of the folderid parameter, allowing attackers to inject malicious SQL commands. This flaw can be exploited remotely without authentication, and proof-of-concept exploit code has been publicly disclosed.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to manipulate database queries, potentially leading to unauthorized data access, data modification, or denial of service. The public availability of exploit details increases the risk of active exploitation.

Affected Products

• Yonyou KSOA 9.0

Discovery Timeline

• 2026-01-19 - CVE-2026-1178 published to NVD
• 2026-01-19 - Last updated in NVD database

Technical Details for CVE-2026-1178

Vulnerability Analysis

This SQL injection vulnerability resides in the /kmf/select.jsp endpoint of Yonyou KSOA 9.0. The affected functionality fails to properly validate and sanitize user-supplied input passed through the folderid HTTP GET parameter. When this parameter is processed by the HTTP GET Parameter Handler component, malicious SQL statements can be concatenated to legitimate database queries, enabling arbitrary SQL command execution against the backend database.

The vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), which encompasses injection flaws where untrusted input is not properly handled before being incorporated into commands or queries. The attack can be executed remotely over the network without requiring any authentication or user interaction, making it particularly dangerous for internet-facing deployments.

Root Cause

The root cause of this vulnerability is insufficient input validation and lack of parameterized queries in the /kmf/select.jsp file. The folderid parameter is directly concatenated into SQL statements without proper sanitization, escaping, or use of prepared statements. This allows attackers to break out of the intended query context and inject arbitrary SQL commands.

Attack Vector

The attack is network-based and can be initiated remotely by sending crafted HTTP GET requests to the vulnerable endpoint. An attacker would manipulate the folderid parameter to include SQL metacharacters and malicious query fragments. The exploit has been publicly disclosed, with technical details available through the GitHub CVE Issue #18 and VulDB #341772.

A typical attack would involve appending SQL syntax to the folderid parameter value in a request to /kmf/select.jsp. The injected SQL could be crafted to extract sensitive data, modify database contents, or potentially execute administrative database operations depending on the database user privileges.

Detection Methods for CVE-2026-1178

Indicators of Compromise

• Suspicious HTTP GET requests to /kmf/select.jsp containing SQL metacharacters (single quotes, semicolons, UNION statements) in the folderid parameter
• Database error messages in application logs indicating malformed SQL queries
• Unusual database query patterns or execution of unexpected stored procedures
• Evidence of data exfiltration or unauthorized database access in audit logs

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in requests to /kmf/select.jsp
• Implement Intrusion Detection System (IDS) signatures to monitor for SQL injection attack payloads targeting the folderid parameter
• Enable detailed application logging to capture requests with suspicious parameter values
• Configure database activity monitoring to alert on anomalous query patterns

Monitoring Recommendations

• Monitor web server access logs for requests to /kmf/select.jsp with encoded or suspicious folderid values
• Set up alerts for database errors that indicate SQL syntax issues or injection attempts
• Review application and database logs regularly for signs of unauthorized data access
• Implement network traffic analysis to detect potential data exfiltration following successful exploitation

How to Mitigate CVE-2026-1178

Immediate Actions Required

• Restrict network access to the Yonyou KSOA 9.0 application to trusted IP addresses only
• Deploy WAF rules to filter SQL injection attempts targeting the folderid parameter
• Consider temporarily disabling or restricting access to the /kmf/select.jsp endpoint if not critical for operations
• Review database user permissions to ensure the application uses least-privilege access

Patch Information

At the time of publication, the vendor (Yonyou) was contacted about this vulnerability but did not respond. No official patch has been released. Organizations should monitor the vendor's security advisories and apply patches as soon as they become available. For the latest information, consult VulDB #341772 and the GitHub CVE Issue #18.

Workarounds

• Implement input validation at the application or reverse proxy level to reject requests containing SQL metacharacters in the folderid parameter
• Use a Web Application Firewall to filter malicious requests before they reach the vulnerable endpoint
• Restrict database user privileges to minimize the impact of successful SQL injection attacks
• Consider network segmentation to isolate the KSOA application from sensitive internal systems

# Example WAF rule concept for blocking SQL injection in folderid parameter
# This is a conceptual configuration - adapt to your specific WAF solution
SecRule ARGS:folderid "@detectSQLi" "id:1001,phase:2,deny,status:403,msg:'SQL Injection attempt blocked in folderid parameter'"