CVE-2026-1133 is a SQL Injection vulnerability identified in Yonyou KSOA version 9.0, a business management software widely used in enterprise environments. The vulnerability exists in the HTTP GET parameter 'folderid' handled by the /kmf/folder.jsp component. An attacker can craft malicious input to this parameter, which is improperly sanitized, allowing arbitrary SQL commands to be injected and executed on the backend database. This can lead to unauthorized data retrieval, modification, or deletion, potentially compromising the confidentiality and integrity of sensitive business data. The vulnerability is exploitable remotely without authentication or user interaction, increasing the attack surface. The vendor has been notified but has not issued a patch or mitigation guidance, and no public exploits have been confirmed in the wild yet. The CVSS 4.0 base score of 6.9 reflects a medium severity, considering the ease of exploitation and the potential impact on data confidentiality, integrity, and availability. The lack of authentication and user interaction requirements makes this vulnerability particularly concerning for exposed deployments. Organizations relying on Yonyou KSOA 9.0 should urgently assess their exposure and implement compensating controls to mitigate risk until an official patch is available.

For European organizations, exploitation of this SQL Injection vulnerability could result in unauthorized access to sensitive corporate data, including financial records, customer information, and internal business processes managed by Yonyou KSOA. This could lead to data breaches, regulatory non-compliance (e.g., GDPR violations), financial losses, and reputational damage. The integrity of business data could be compromised, affecting decision-making and operational continuity. Availability impacts are possible if attackers execute destructive SQL commands or disrupt database operations. Given the remote and unauthenticated nature of the attack, organizations with internet-facing instances of Yonyou KSOA 9.0 are particularly vulnerable. The absence of vendor patches increases the risk window, necessitating immediate mitigation efforts. The threat is especially relevant for sectors such as manufacturing, finance, and government agencies in Europe that utilize Yonyou products for enterprise resource planning and operations management.

1. Implement strict input validation and sanitization on all user-supplied parameters, especially 'folderid', to prevent malicious SQL payloads. 2. Deploy a Web Application Firewall (WAF) with custom rules to detect and block SQL Injection attempts targeting the vulnerable endpoint. 3. Restrict network access to the Yonyou KSOA application, limiting exposure to trusted internal networks or VPNs where possible. 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 flaws. 6. Engage with Yonyou support channels persistently to obtain official patches or guidance. 7. Consider temporary application-layer mitigations such as disabling or restricting access to the vulnerable /kmf/folder.jsp endpoint if feasible. 8. Maintain up-to-date backups of critical data to enable recovery in case of data corruption or loss. 9. Educate IT and security teams about the vulnerability and ensure incident response plans include scenarios involving SQL Injection attacks.