CVE-2026-1131: Yonyou KSOA 9.0 SQL Injection Vulnerability

CVE-2026-1131 Overview

A SQL injection vulnerability has been identified in Yonyou KSOA 9.0 affecting the /kmc/save_catalog.jsp file within the HTTP GET Parameter Handler component. The vulnerability allows remote attackers to manipulate the catalogid parameter to inject malicious SQL commands, potentially compromising database integrity and confidentiality. The exploit has been publicly disclosed, and the vendor was contacted but did not respond to the disclosure.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to execute arbitrary SQL commands against the backend database, potentially leading to unauthorized data access, modification, or deletion without authentication.

Affected Products

• Yonyou KSOA 9.0

Discovery Timeline

• 2026-01-19 - CVE CVE-2026-1131 published to NVD
• 2026-01-19 - Last updated in NVD database

Technical Details for CVE-2026-1131

Vulnerability Analysis

This SQL injection vulnerability exists in Yonyou KSOA 9.0's catalog management functionality. The vulnerable endpoint /kmc/save_catalog.jsp fails to properly sanitize user-supplied input in the catalogid parameter before incorporating it into SQL queries. This injection flaw is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

The vulnerability is remotely exploitable without any authentication requirements or user interaction. Attackers can craft malicious HTTP GET requests containing SQL injection payloads in the catalogid parameter to manipulate database queries. This can result in unauthorized access to sensitive data, data manipulation, or potential escalation depending on database permissions and configuration.

Root Cause

The root cause of this vulnerability is insufficient input validation and lack of parameterized queries in the save_catalog.jsp file. The application directly concatenates user-controlled input from the catalogid HTTP GET parameter into SQL statements without proper sanitization or the use of prepared statements, allowing attackers to inject arbitrary SQL syntax.

Attack Vector

The attack vector is network-based, requiring no authentication or user interaction. An attacker can send crafted HTTP GET requests to the vulnerable endpoint /kmc/save_catalog.jsp with malicious SQL payloads embedded in the catalogid parameter.

The exploitation involves injecting SQL metacharacters and commands through the catalogid parameter. For example, an attacker could append SQL operators or subqueries to extract data from the database, modify records, or potentially execute administrative operations depending on the database user privileges. Technical details and proof-of-concept information can be found in the GitHub Issue Discussion and VulDB entry #341721.

Detection Methods for CVE-2026-1131

Indicators of Compromise

• HTTP GET requests to /kmc/save_catalog.jsp containing SQL metacharacters such as single quotes, double dashes, semicolons, or UNION statements in the catalogid parameter
• Unusual database query errors in application logs indicating syntax errors or unexpected query patterns
• Abnormal data access patterns or unauthorized database modifications traced to the catalog management endpoint
• Web server access logs showing repeated requests to the vulnerable JSP file with varying parameter values

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in HTTP GET parameters targeting /kmc/save_catalog.jsp
• Implement application-level logging to capture all requests to the vulnerable endpoint and flag those containing common SQL injection payloads
• Use database activity monitoring to identify unusual query patterns or unauthorized data access originating from the KSOA application
• Configure intrusion detection systems (IDS) with signatures for SQL injection attack patterns targeting JSP applications

Monitoring Recommendations

• Monitor web server access logs for requests to /kmc/save_catalog.jsp with suspicious catalogid parameter values
• Implement real-time alerting for database errors that may indicate attempted SQL injection exploitation
• Track and alert on any unusual data extraction or modification patterns in database audit logs

How to Mitigate CVE-2026-1131

Immediate Actions Required

• Restrict network access to the Yonyou KSOA application to trusted IP addresses or internal networks only
• Implement WAF rules to filter SQL injection attempts targeting the catalogid parameter
• Review and audit database permissions to ensure the application database user has minimal required privileges
• Enable detailed logging for the vulnerable endpoint to detect exploitation attempts

Patch Information

No official patch is currently available from the vendor. The vendor was contacted during responsible disclosure but did not respond. Organizations should monitor vendor communications and apply patches as soon as they become available. Technical details about this vulnerability are documented in VulDB #341721.

Workarounds

• Implement input validation at the application or web server level to reject requests containing SQL injection characters in the catalogid parameter
• Deploy a reverse proxy or WAF with SQL injection detection capabilities in front of the KSOA application
• Consider isolating the KSOA system from public networks until a vendor patch is available
• Apply network segmentation to limit potential lateral movement if the system is compromised

If using a reverse proxy or WAF, configure rules to block common SQL injection patterns. For Apache mod_security, the following configuration can help detect and block SQL injection attempts:

# Apache mod_security configuration example
SecRule ARGS:catalogid "@detectSQLi" \
    "id:1001,phase:2,deny,status:403,msg:'SQL Injection Attempt Detected in catalogid parameter'"