CVE-2026-1122 identifies a SQL injection vulnerability in Yonyou KSOA version 9.0, specifically within the /worksheet/work_info.jsp component's HTTP GET parameter handler. The vulnerability arises due to insufficient sanitization or validation of the 'ID' parameter passed via HTTP GET requests, allowing an attacker to inject malicious SQL queries. This can be exploited remotely without authentication or user interaction, making it accessible to any attacker with network access to the application. The SQL injection could enable attackers to read, modify, or delete sensitive data stored in the backend database, potentially compromising the confidentiality, integrity, and availability of the system. The CVSS 4.0 score of 6.9 (medium severity) reflects the ease of exploitation (low complexity, no privileges or user interaction required) but limited scope and impact due to the vulnerability's context. The vendor has been notified but has not provided a patch or mitigation guidance, increasing the risk exposure. No known exploits have been reported in the wild yet, but public disclosure of the vulnerability increases the likelihood of future exploitation attempts. Yonyou KSOA is an enterprise resource planning (ERP) solution widely used in various industries, including finance, manufacturing, and government sectors, which may contain sensitive business data. The vulnerability's exploitation could lead to data breaches, unauthorized transactions, or disruption of business operations.

For European organizations, the exploitation of CVE-2026-1122 could result in unauthorized access to sensitive corporate data, including financial records, employee information, and operational details. This could lead to data breaches, regulatory non-compliance (e.g., GDPR violations), financial losses, and reputational damage. The integrity of business-critical data could be compromised, affecting decision-making and operational continuity. Availability impacts could arise if attackers execute destructive SQL commands or disrupt database services. Given the remote and unauthenticated nature of the vulnerability, attackers could exploit it from anywhere, increasing the risk to European entities using Yonyou KSOA 9.0. The lack of vendor patches means organizations must rely on internal controls and monitoring to mitigate risk. Industries with high regulatory scrutiny and data sensitivity, such as finance, healthcare, and government, are particularly vulnerable. Additionally, the public disclosure may attract opportunistic attackers targeting European companies with known deployments of this software.

1. Implement Web Application Firewalls (WAFs) with SQL injection detection and prevention rules tailored to Yonyou KSOA traffic patterns, focusing on the /worksheet/work_info.jsp endpoint and the 'ID' parameter. 2. Apply strict input validation and sanitization on all HTTP GET parameters, especially 'ID', to ensure only expected data types and formats are accepted. 3. Employ parameterized queries or prepared statements in the application code to prevent SQL injection, if source code access is available. 4. Monitor application and database logs for unusual or suspicious query patterns indicative of injection attempts. 5. Restrict network access to the KSOA application to trusted IP ranges and enforce strong network segmentation to limit exposure. 6. Conduct regular security assessments and penetration testing focusing on injection vulnerabilities. 7. Engage with Yonyou support channels to seek updates or patches and subscribe to vulnerability advisories for timely information. 8. Consider deploying database activity monitoring tools to detect and alert on anomalous SQL commands. 9. Prepare incident response plans specific to SQL injection incidents to enable rapid containment and recovery. 10. If possible, upgrade to a newer, patched version of Yonyou KSOA once available.