CVE-2026-1122 identifies a SQL injection vulnerability in Yonyou KSOA version 9.0, specifically within the HTTP GET parameter handler of the /worksheet/work_info.jsp component. The vulnerability arises from improper sanitization or validation of the 'ID' parameter, which attackers can manipulate to inject arbitrary SQL queries. This injection flaw allows remote attackers to execute unauthorized SQL commands on the backend database without requiring authentication or user interaction. The vulnerability has a CVSS 4.0 base score of 6.9, indicating a medium severity level, with an attack vector of network (remote), low attack complexity, and no privileges or user interaction needed. The impact includes potential unauthorized disclosure, modification, or deletion of data, which compromises confidentiality, integrity, and availability to a limited extent. The vendor has been notified but has not provided a patch or mitigation guidance, and while public exploit code exists, no active exploitation has been reported. This vulnerability primarily affects organizations using Yonyou KSOA 9.0, a business software suite widely used in China and other Asian markets. The lack of a patch and public exploit availability increases the urgency for affected organizations to implement defensive measures.

The SQL injection vulnerability in Yonyou KSOA 9.0 can lead to unauthorized access and manipulation of sensitive business data stored in backend databases. Exploitation could allow attackers to extract confidential information, alter records, or delete critical data, potentially disrupting business operations. The compromise of data integrity and availability could affect financial reporting, workflow management, and other enterprise functions relying on KSOA. Since the vulnerability requires no authentication and can be exploited remotely, it poses a significant risk of widespread exploitation if left unmitigated. Organizations in sectors such as finance, manufacturing, and government using Yonyou KSOA may face data breaches, regulatory penalties, and reputational damage. The absence of vendor patches increases the window of exposure, making timely mitigation critical to prevent potential attacks.

1. Implement Web Application Firewall (WAF) rules to detect and block malicious SQL injection payloads targeting the 'ID' parameter in /worksheet/work_info.jsp requests. 2. Employ strict input validation and sanitization at the application or proxy level to reject unexpected or malformed input values for the 'ID' parameter. 3. Restrict network access to the affected application endpoints to trusted internal IPs or VPN users where feasible, reducing exposure to external attackers. 4. Monitor application logs and network traffic for unusual query patterns or error messages indicative of SQL injection attempts. 5. If possible, deploy database activity monitoring to detect anomalous queries originating from the KSOA application. 6. Engage with Yonyou support channels to request official patches or updates and track any future advisories. 7. Consider isolating or segmenting the affected application environment to limit lateral movement in case of compromise. 8. Prepare incident response plans specific to SQL injection attacks, including data backup and recovery strategies. 9. Evaluate alternative software solutions if patching or mitigation is not feasible in the short term.