Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck

CVE-2026-109164TDuck survey form through 6.0 Authorization Bypass via User-Controlled Submission IDs in POST /user/form/data/delete/{formKey}

High 7.1

In plain English

A high-severity authorization bypass via user-controlled key in tduck-survey-form from TDuckCloud. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).

Severity (CVSS 3.1)7.1High

Exploit odds (30 days)0.3%top 76.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

TDuck survey form through 6.0 contains an insecure direct object reference vulnerability that allows authenticated users to delete other users' form submissions by supplying arbitrary submission ids. Attackers can place their own formKey in the path and iterate sequential submission ids in the request body to permanently delete submissions platform-wide.

Affected products (as reported)

Vendor	Product	Versions
TDuckCloud	tduck-survey-form	0 – through 6.0

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

References

Researcher Proof of Concept exploit
Vulnerable Code (6.0) technical-description
Vulnerable Code (6.0) technical-description
VulnCheck Advisory: TDuck survey form through 6.0 Authorization Bypass via User-Controlled Submission IDs in POST /user/form/data/delete/{formKey} third-party-advisory