CVE-2026-16624

Published: Lug 22, 2026 Last Modified: Lug 27, 2026

ExploitDB:

Other exploit source:

Google Dorks:

CRITICAL 9,6

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Attack Vector: network

Attack Complexity: low

Privileges Required: low

User Interaction: none

Scope: changed

Confidentiality: high

Integrity: high

Availability: none

Description

AI Translation Available

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.

639

Authorization Bypass Through User-Controlled Key

Incomplete

Abstraction: Base Structure: Simple

Common Consequences

Security Scopes Affected:

Access Control

Potential Impacts:

Bypass Protection Mechanism Gain Privileges Or Assume Identity

Applicable Platforms

All platforms may be affected

Likelihood of Exploit: High

View CWE Details

https://vokecyber.com/research/calcom-cross-tenant-webhook-…

https://vokecyber.com/research/calcom-cross-tenant-webhook-plant

https://github.com/calcom/cal.diy/security/advisories/GHSA-…

https://github.com/calcom/cal.diy/security/advisories/GHSA-4fwh-xxpv-xfm6