CVE-2026-1124 is a SQL Injection vulnerability identified in Yonyou KSOA version 9.0, specifically within the HTTP GET parameter handler of the /worksheet/work_report.jsp component. The vulnerability arises from improper sanitization of the 'ID' parameter, allowing attackers to inject malicious SQL queries remotely without requiring authentication or user interaction. This flaw can lead to unauthorized data access, modification, or deletion, potentially compromising the confidentiality, integrity, and availability of the backend database. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and partial impact on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). The vendor was notified early but has not issued any response or patch, and while no active exploitation in the wild has been reported, public exploit code is available, increasing the risk of attacks. This vulnerability affects organizations using Yonyou KSOA 9.0, a widely used enterprise resource planning (ERP) and office automation platform, particularly in Chinese and other Asian markets. The lack of vendor response and patch availability necessitates immediate defensive measures to mitigate potential exploitation.

The SQL Injection vulnerability in Yonyou KSOA 9.0 can have significant impacts on affected organizations worldwide. Successful exploitation allows remote attackers to execute arbitrary SQL commands on the backend database, potentially leading to unauthorized data disclosure, data manipulation, or deletion. This can result in loss of sensitive business information, intellectual property theft, disruption of business operations, and damage to organizational reputation. Since the vulnerability requires no authentication or user interaction, it can be exploited at scale by automated tools, increasing the risk of widespread compromise. The partial impact on confidentiality, integrity, and availability means attackers could extract sensitive data, alter records, or cause service disruptions. Organizations relying on Yonyou KSOA for critical business processes may face operational downtime and regulatory compliance issues if exploited. The absence of vendor patches further exacerbates the risk, making proactive mitigation essential.

1. Implement strict input validation and sanitization on all user-supplied parameters, especially the 'ID' parameter in /worksheet/work_report.jsp, to prevent injection of malicious SQL code. 2. Deploy Web Application Firewalls (WAFs) with rules specifically designed to detect and block SQL Injection attempts targeting Yonyou KSOA endpoints. 3. Restrict network access to the Yonyou KSOA application servers by limiting exposure to trusted internal networks or VPNs, reducing the attack surface. 4. Monitor application logs and database queries for unusual or suspicious activity indicative of SQL Injection attempts. 5. Conduct regular security assessments and penetration testing focused on injection vulnerabilities within Yonyou KSOA. 6. Isolate the database server from direct internet access and enforce least privilege principles on database accounts used by the application. 7. Maintain up-to-date backups of critical data to enable recovery in case of data corruption or deletion. 8. Engage with Yonyou support channels persistently to obtain official patches or guidance, and consider vendor alternatives if support remains unavailable. 9. Educate development and operations teams about secure coding practices and the risks of SQL Injection to prevent similar vulnerabilities in future deployments.