{"id":"CVE-2026-109165","revision":"721a6942ab3c4f94b7368e3e1d14e6a7","records":[{"revision":"721a6942ab3c4f94b7368e3e1d14e6a7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-109165","aliases":[],"title":"TDuck survey form through 6.0 Authorization Bypass via User-Controlled Form Key in POST /user/form/item/batch/create","description":"TDuck survey form through 6.0 contains a broken access control vulnerability that allows authenticated users to add fields to other users' forms via POST /user/form/item/batch/create. Attackers can submit an array whose first element references their own form and later elements reference a victim's formKey, injecting attacker-chosen fields onto the victim's public fill page.","state":0,"publishedAt":"2026-10-12T13:10:30.927+00:00","modifiedAt":"2026-10-14T17:41:17.318+00:00","affected":[{"ecosystem":"https://github.com/TDuckCloud/tduck-survey-form","name":"tduck-survey-form","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"TDuckCloud\",\n                    \"product\": \"tduck-survey-form\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"6.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"collectionURL\": \"https://github.com/TDuckCloud/tduck-survey-form\",\n                    \"repo\": \"https://github.com/TDuckCloud/tduck-survey-form\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3,"severity":"MEDIUM"}],"references":["https://github.com/AnkesKasty/cve-request-poc/blob/a7b6d1423555812d8efa26c91c5d0683164b31e5/tduck/poc_form_item_batch_create_cross_form.py","https://github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bbaa19502/tduck-api/src/main/java/com/tduck/cloud/api/web/controller/UserFormController.java#L327-L336","https://www.vulncheck.com/advisories/tduck-survey-form-through-6.0-authorization-bypass-via-user-controlled-form-key-in-post-user-form-item-batch-create"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109165","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-109165","identifiers":["CVE-2026-109165"]},"retained":false,"historicalAffected":[]}],"coverage":[]}