Vulnerability Description
TypeBot is a chatbot builder tool. In versions 3.16.0 and prior, the WhatsApp Cloud API webhook endpoint (POST /v1/workspaces/{workspaceId}/whatsapp/{credentialsId}/webhook) does not verify the x-hub-signature-256 HMAC signature included by Meta in every webhook delivery. The webhook URL exposes both workspaceId and credentialsId as path parameters, which are logged in web server access logs, visible in Meta's webhook configuration dashboard, and potentially shared when configuring integrations. This allows any unauthenticated attacker to send spoofed webhook messages to trigger bot flows, consume API resources, and interact with external services using the workspace owner's credentials. The issue has been fixed in version 3.17.0.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/baptisteArno/typebot.io/releases/tag/v3.17.0
- https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-8vqp-r5w7-v4
- https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-8vqp-r5w7-v4
FAQ
What is CVE-2026-39969?
CVE-2026-39969 is a vulnerability with a CVSS score of 6.5 (MEDIUM). TypeBot is a chatbot builder tool. In versions 3.16.0 and prior, the WhatsApp Cloud API webhook endpoint (POST /v1/workspaces/{workspaceId}/whatsapp/{credentialsId}/webhook) does not verify the x-hub-...
How severe is CVE-2026-39969?
CVE-2026-39969 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-39969?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.