CVE-2026-1130: Yonyou KSOA 9.0 SQL Injection Vulnerability

CVE-2026-1130 Overview

A SQL injection vulnerability has been identified in Yonyou KSOA 9.0, affecting the HTTP GET Parameter Handler component. The flaw exists within the file /worksheet/worksadd_plan.jsp and can be exploited through manipulation of the ID parameter. This vulnerability allows remote attackers to inject malicious SQL queries, potentially leading to unauthorized data access, modification, or deletion of database contents.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability without authentication to compromise database integrity, extract sensitive information, or manipulate application data through crafted HTTP GET requests.

Affected Products

• Yonyou KSOA 9.0
• HTTP GET Parameter Handler component
• /worksheet/worksadd_plan.jsp endpoint

Discovery Timeline

• 2026-01-19 - CVE CVE-2026-1130 published to NVD
• 2026-01-19 - Last updated in NVD database

Technical Details for CVE-2026-1130

Vulnerability Analysis

This SQL injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) occurs in the Yonyou KSOA 9.0 application when processing user-supplied input through the ID parameter. The application fails to properly sanitize or parameterize user input before incorporating it into SQL queries, allowing attackers to inject arbitrary SQL commands.

The vulnerability is remotely exploitable and requires no authentication, making it accessible to any network-based attacker who can reach the vulnerable endpoint. The exploit has been publicly disclosed, and proof-of-concept information is available through vulnerability databases. The vendor was contacted about this disclosure but did not respond, leaving organizations potentially without an official patch.

Root Cause

The root cause of this vulnerability is improper input validation and the lack of parameterized queries in the /worksheet/worksadd_plan.jsp file. When the ID parameter is passed via HTTP GET requests, the application directly concatenates this user-controlled input into SQL statements without proper sanitization, escaping, or the use of prepared statements. This classic injection pattern allows attackers to break out of the intended query structure and execute arbitrary SQL commands.

Attack Vector

The attack vector is network-based, requiring the attacker to send crafted HTTP GET requests to the vulnerable /worksheet/worksadd_plan.jsp endpoint. By manipulating the ID parameter with SQL injection payloads, attackers can alter the logic of backend SQL queries. This could enable them to bypass authentication mechanisms, extract sensitive data from the database, modify or delete records, or potentially achieve remote code execution depending on the database configuration and permissions.

The vulnerability can be exploited through standard web request tools or browsers by crafting malicious URLs containing SQL injection payloads in the ID parameter. Additional technical details regarding the exploitation technique can be found in the GitHub CVE Issue Discussion and VulDB #341720.

Detection Methods for CVE-2026-1130

Indicators of Compromise

• Unusual or malformed HTTP GET requests to /worksheet/worksadd_plan.jsp containing SQL syntax in the ID parameter
• Database error messages appearing in application logs indicating syntax errors or unexpected query behavior
• Anomalous database queries containing UNION SELECT, OR 1=1, or other SQL injection patterns
• Unexpected data exfiltration or modification in backend database systems

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common SQL injection patterns in the ID parameter
• Deploy intrusion detection systems (IDS) with signatures for SQL injection attempts targeting JSP applications
• Monitor HTTP access logs for requests containing suspicious characters such as single quotes, semicolons, or SQL keywords in query parameters
• Enable database query logging and audit for unusual query patterns or errors

Monitoring Recommendations

• Configure real-time alerting for SQL syntax errors in application and database logs
• Establish baseline behavior for the /worksheet/worksadd_plan.jsp endpoint and alert on deviations
• Monitor for signs of data exfiltration such as large database responses or unusual outbound connections
• Review authentication logs for unauthorized access following potential SQL injection exploitation

How to Mitigate CVE-2026-1130

Immediate Actions Required

• Restrict network access to the /worksheet/worksadd_plan.jsp endpoint using firewall rules or access control lists
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules enabled
• If possible, disable or remove the vulnerable JSP page until a patch is available
• Implement input validation and parameterized queries at the application level if source code access is available

Patch Information

No official patch has been released by the vendor at this time. According to the vulnerability disclosure, the vendor was contacted early about this issue but did not respond. Organizations should monitor vendor communications for security updates and consider implementing compensating controls until an official fix is available. For additional details, refer to VulDB Submission #734565.

Workarounds

• Implement strict input validation on the ID parameter, allowing only expected data types (e.g., numeric values)
• Deploy a reverse proxy or WAF configured to sanitize or block requests containing SQL injection patterns
• Restrict access to the Yonyou KSOA application to trusted networks or IP addresses only
• Consider database-level controls such as limiting the web application's database user permissions to read-only where possible

# Example WAF rule configuration for ModSecurity
# Block SQL injection attempts in ID parameter
SecRule ARGS:ID "@detectSQLi" \
    "id:1001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection attempt detected in ID parameter',\
    tag:'CVE-2026-1130'"