CVE-2026-1121
Published: 18 January 2026
Summary
CVE-2026-1121 is a medium-severity Injection (CWE-74) vulnerability in Yonyou Ksoa. Its CVSS base score is 6.9 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 36.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SC-7 (Boundary Protection).
Deeper analysis
CVE-2026-1121 is a SQL injection vulnerability (CWE-74, CWE-89) in Yonyou KSOA 9.0, affecting an unknown function within the file /worksheet/del_workplan.jsp of the HTTP GET Parameter Handler component. The issue arises from manipulation of the 'ID' argument, enabling remote SQL injection attacks. Published on 2026-01-18, it carries a CVSS v3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).
Unauthenticated remote attackers can exploit this vulnerability over the network with low complexity and no user interaction required. Successful exploitation grants limited access to confidential data, moderate integrity modifications, and low denial-of-service potential against the affected component.
Advisories referenced in GitHub (https://github.com/LX-66-LX/cve/issues/7) and VulDB (https://vuldb.com/?ctiid.341713, https://vuldb.com/?id.341713, https://vuldb.com/?submit.734548) detail the issue, noting that an exploit has been made public. The vendor was contacted early for disclosure but provided no response, and no patches or mitigations are documented.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-3174
Vulnerability details
A vulnerability was found in Yonyou KSOA 9.0. This affects an unknown function of the file /worksheet/del_workplan.jsp of the component HTTP GET Parameter Handler. The manipulation of the argument ID results in sql injection. The attack can be launched remotely.…
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The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Direct unauthenticated remote SQL injection in a public-facing web application component (/worksheet/del_workplan.jsp) matches T1190 Exploit Public-Facing Application as the primary initial access vector.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation and sanitization of untrusted inputs such as the 'ID' GET parameter before it reaches SQL processing in del_workplan.jsp.
Enables continuous monitoring and anomaly detection on database queries or web requests that exhibit SQL injection patterns against the vulnerable endpoint.
Boundary protection mechanisms such as a WAF can inspect and block malicious SQL payloads in HTTP GET requests to /worksheet/del_workplan.jsp.