Security Advisory
CVE-2026-16624
9.6
CRITICAL
Vulnerability Description
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.
Published Date
July 22, 2026
Official Source
NIST NVD Advisory