Read the docs
TI-2026-70950 Aliases CVE-2026-109165GHSA-xjj9-v7hq-9hc8

Authorization bypass in TDuck survey form lets users inject fields

Priority MEDIUM 57CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

TDuckCloud tduck-survey-form from 0 through 6.0 contains an authorization bypass that lets an authenticated user add fields to other users' forms. The flaw is that the server trusts a user-controlled form key, so a request can reference a form the user does not own (CWE-639). An attacker with low privileges can inject chosen fields onto a victim's public fill page over the network. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00238 14th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TDuckCloudtduck-survey-formup to 6.0—No fix listedCNA
  • tduck-survey-form VendorTDuckCloud Affected up to 6.0 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for tduck-survey-form.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-12 Threatist record created from CVE-2026-109165
  2. 2026-10-12 Alias added: GHSA-xjj9-v7hq-9hc8
  3. 2026-10-15 CISA SSVC decision points changed
  4. 2026-10-15 Priority changed: LOW → MEDIUM

References

Exploit 1

Other 1

  • TI-2025-35590 SQL Injection vulnerability in TDuckCloud v.5.1 allows a remote attacker to execute… CVSS 3.1CRITICAL 9.8
  • TI-2026-64638 TDuck survey form through 6.0 Write Password Bypass via Client-Side Enforcement CVSS 4.0MEDIUM 6.9
  • TI-2024-08062 TDuckCloud TDuckPro password recovery CVSS 4.0MEDIUM 6.9
  • TI-2023-28429 SQL Injection vulnerability in TDuckCLoud tduck-platform v.4.0 allows a remote attacker… CVSS 3.1HIGH 8.1
  • TI-2026-70949 Authorization bypass in TDuck survey form allows submission deletion CVSS 4.0HIGH 7.1
  • TI-2026-62458 TDuck survey form through 5.3 Server-Side Request Forgery via Unvalidated Webhook URL CVSS 4.0HIGH 7.1
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences