{"schema":"threatline.record/2","record":{"id":"CVE-2026-109165","aliases":[],"summary":"TDuck survey form through 6.0 Authorization Bypass via User-Controlled Form Key in POST /user/form/item/batch/create","details":"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.","categories":["Unclassified"],"product":"tduck-survey-form","vendor":"TDuckCloud","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109165","source_modified_at":"2026-10-14T17:41:17.318Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"tduck-survey-form","vendor":"TDuckCloud","versions":[{"version":"0","lessThanOrEqual":"6.0","status":"affected","versionType":"custom"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":5.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00238,"percentile":0.14072,"score_date":"2026-10-23"},"published_at":"2026-10-12T13:10:30.927Z","modified_at":"2026-10-14T17:41:17.318Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-109165","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-14T17:41:17.318Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-109165","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/AnkesKasty/cve-request-poc/blob/a7b6d1423555812d8efa26c91c5d0683164b31e5/tduck/poc_form_item_batch_create_cross_form.py","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/TDuckCloud/tduck-survey-form/blob/43ffa9c993e38936fc4de7d8e5aee82bbaa19502/tduck-api/src/main/java/com/tduck/cloud/api/web/controller/UserFormController.java#L327-L336","tags":["technical-description"]},{"source":"CVE List","url":"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","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-14T17:41:02.889377Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-14T17:41:17.318Z","content_hash":"07fc8b72f8c36a146c071e6af53a2801dcc0765b16c0441061bef3879bb09705"}}