CVE-2026-39969

MEDIUM 6.5

TypeBot: WhatsApp Webhook Endpoint Missing Signature Verification

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-287 CWE-345
Vendor	baptistearno
Product	typebot.io
Published	May 22, 2026
Last Updated	May 23, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

baptisteArno / typebot.io

< 3.17.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-8vqp-r5w7-v47f github.com: https://github.com/baptisteArno/typebot.io/releases/tag/v3.17.0