KsoaApplication · Yonyou

CVE-2026-1129

CRITICAL · 9.8 CVSS v3.1 Published 2026-01-19
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A vulnerability was detected in Yonyou KSOA 9.0. This vulnerability affects unknown code of the file /worksheet/worksadd.jsp of the component HTTP GET Parameter Handler. The manipulation of the argument ID results in sql injection. The attack may be performed from remote. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

SQL injection vulnerability in Yonyou KSOA 9.0 allows remote attackers to inject malicious SQL queries via the ID parameter in the /worksheet/worksadd.jsp file. The vulnerability is actively exploited and requires no authentication, enabling complete database compromise.

MitigationImmediately restrict network access to the /worksheet/worksadd.jsp endpoint and implement WAF rules to block SQL injection patterns. Until vendor patch is available, consider disabling the affected functionality or implementing compensating controls.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
KsoaApplication
Affected:= 9.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify Yonyou KSOA installation and version
    Check for the presence of Yonyou KSOA web application files in the web server root directory or check the application's About/Version page. Common paths include /ksoa or /KSOA directories. Look for version information in the application metadata or startup logs.
    Affected if The installed version is Yonyou KSOA version 9.0 exactly
  2. Verify worksadd.jsp is accessible
    Attempt to access the vulnerable endpoint via HTTP GET request to /worksheet/worksadd.jsp on the server. Check if the application returns a valid response rather than a 404 error.
    Affected if The /worksheet/worksadd.jsp endpoint exists and responds to HTTP requests
  3. Confirm the ID parameter is accepted
    Send a benign HTTP GET request to /worksheet/worksadd.jsp with a test ID parameter value (e.g., ?ID=1) and observe the application's response to confirm the parameter is processed.
    Affected if The ID parameter is accepted and processed by the worksadd.jsp page without validation errors
  4. Test for SQL injection behavior
    Compare application responses when sending a valid ID value versus a SQL injection payload (e.g., ID=1' OR '1'='1). Look for differences in database error messages, response content, or application behavior that indicate unsanitized SQL input.
    Affected if The application exhibits different behavior when SQL syntax is injected into the ID parameter, suggesting the input is not properly sanitized before being used in a database query

You are affected if Yonyou KSOA version 9.0 is running and the /worksheet/worksadd.jsp endpoint is accessible with an unpatched ID parameter vulnerable to SQL injection.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Immediately restrict network access to the /worksheet/worksadd.jsp endpoint and implement WAF rules to block SQL injection patterns. Until vendor patch is available, consider disabling the affected functionality or implementing compensating controls.

Fix this in Ksoa Scoped from the published advisory
  • Consultation6.0 h
  • Implementation12.0 h
  • Testing10.0 h
  • Review / QA6.0 h
34.0 hours of engineering $5,940
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-1129 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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