Auth bypass in Tduckcloud Tduck-Survey-Form
CVE-2026-109164
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.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/AnkesKasty/cve-request-poc/blob/a7b6d1423555812d8efa26c91c5d0683164b… (exploit)
- github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bba… (technical-description)
- github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bba… (technical-description)
- www.vulncheck.com/advisories/tduck-survey-form-through-6.0-authorization-bypass… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109164?
- CVE-2026-109164 is a high-severity vulnerability in Tduckcloud Tduck-Survey-Form, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 7.1/10. Published 2026-10-12.
- How severe is CVE-2026-109164?
- High severity. CVSS v3 base score is 7.1 out of 10.