CVE-2026-92567: TDuck survey form authorization bypass in form data update

CVE-2026-92567 · Severity: medium · CVSS 6.5 · Published 2026-09-16

TDuck is an open-source survey and form submission system used by enterprises to collect questionnaire responses. The vulnerability allows authenticated users to modify other users' form submission data by bypassing ownership validation on the data update endpoint, potentially exposing or corrupting sensitive personal information collected through surveys and questionnaires.

Technologies: Tduckcloud Tduck-Survey-Form. Vendors: Tduckcloud.

Quick answers

Is CVE-2026-92567 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-92567 being exploited in the wild.
How severe is CVE-2026-92567?
Medium severity, with a CVSS score of 6.5, published 16 September 2026.
Which products and versions are affected?
Tduckcloud Tduck-Survey-Form through 5.0.
Is there a fix for CVE-2026-92567?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-92567 attacked?
It is attacked over the network.
Am I affected by CVE-2026-92567?
Check whether you run Tduckcloud Tduck-Survey-Form at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An authorization bypass vulnerability exists in the POST /user/form/data/update endpoint of TDuck survey form through version 5.0. The vulnerable component (UserFormResultController) fails to validate ownership before allowing authenticated users to update form submission data. Attackers can enumerate submission identifiers allocated in narrow, predictable ranges and send update requests to modify arbitrary form responses without proper authorization checks. The attack requires prior authentication but no special privileges, and can result in unauthorized modification of sensitive personal data contained in survey submissions. A patch addressing the ownership validation is likely available in versions after 5.0.

Affected products

  • TDuckCloud tduck-survey-form through 5.0

Timeline

  • 2026-09-16: disclosed

References

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