CVE-2026-92602 TDuckCloud CVE debrief

Who should care

Defenders responsible for TDuck survey form deployments should assess exposure and verify webhook URL validation and form ownership verification to prevent unauthorized webhook attachments and data exfiltration.

Why it matters

CVE-2026-92602 allows authenticated attackers to exfiltrate submissions to arbitrary addresses due to lack of webhook URL validation and form ownership verification in TDuck survey form versions up to 5.3. Defenders should verify and restrict webhook configurations.

• Verify webhook URL validation to prevent data exfiltration.
• Restrict access to WebhookConfigController to prevent unauthorized webhook attachments.
• Monitor for suspicious webhook activity and form submissions to detect potential exploitation.

Technical summary

The TDuck survey form through version 5.3 fails to validate webhook URLs or verify form ownership in the WebhookConfigController. This allows authenticated attackers to attach webhooks to other users' forms and exfiltrate submissions to arbitrary external or internal addresses. The vulnerability enables attackers to exfiltrate sensitive information, potentially leading to further exploitation. Defenders should prioritize verifying webhook URL validation and form ownership verification in TDuck survey form versions up to 5.3 to prevent such attacks.

Defensive priority

Defenders should prioritize verifying webhook URL validation and form ownership verification in TDuck survey form versions up to 5.3.

Recommended defensive actions

• Verify webhook URL validation and form ownership verification in TDuck survey form versions up to 5.3.
• Restrict access to WebhookConfigController to prevent unauthorized webhook attachments.
• Monitor for suspicious webhook activity and form submissions.
• Update to a version of TDuck survey form that validates webhook URLs and verifies form ownership.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and source references indicate that TDuck survey form through version 5.3 fails to validate webhook URLs or verify form ownership in the WebhookConfigController, allowing authenticated attackers to attach webhooks to other users' forms and exfiltrate submissions to arbitrary external or internal addresses.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.