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CVE-2026-39969

TypeBot: WhatsApp Webhook Endpoint Missing Signature Verification

Published: May 22, 2026Updated: May 23, 2026 Sources: CVE ListCWE-287CWE-287: Improper Authentication
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.2%
Top 94.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-287CWE-287: Improper AuthenticationCWE-345CWE-345: Insufficient Verification of Data Authenticity

Affected Products

typebot.iobaptisteArno
SaaS
Cloud & SaaS / saas-application
baptistearnoCloud & SaaSaka typebot.io

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

3 techniques
Collection
Initial Access
View detailed technique mapping

References

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
github.com

Timeline

Published
May 22, 2026
Last Updated
May 23, 2026

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