CVE-2026-16624

Cal.com OSS ships lacks authorization on webhook teamId creation, allowing any authenticated user to create a webhook on any team via unvalidated teamId injection, then steal booking data, including fields like organizer/attendee emails and custom responses, and conditionally video-call passwords, by triggering webhook delivery.

CVSS v3 9.6 CRITICAL

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/calcom/cal.diy/security/advisories/GHSA-4fwh-xxpv-xfm6
https://vokecyber.com/research/calcom-cross-tenant-webhook-plant
https://vokecyber.com/research/calcom-cross-tenant-webhook-plant

Configurations

No configuration.

History

24 Oct 2026, 13:10

Type	Values Removed	Values Added
Summary		(es) Cal.com OSS carece de autorización en la creación de teamId de webhook, permitiendo a cualquier usuario autenticado crear un webhook en cualquier equipo mediante la inyección de un teamId no validado, para luego robar datos de reserva, incluyendo campos como correos electrónicos de organizador/asistente y respuestas personalizadas, y, condicionalmente, contraseñas de videollamadas, al activar la entrega del webhook.

Information

Published : 2026-07-22 19:16

Updated : 2026-10-24 13:10

NVD link : CVE-2026-16624

Mitre link : CVE-2026-16624

CVE.ORG link : CVE-2026-16624

JSON object : View

Products Affected

No product.

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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