CVE-2026-16624 CVE-2026-16624
Authenticated users can create webhooks for any team by injecting unvalidated team IDs, allowing them to steal sensitive booking data including emails and passwords.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16624?
CVE-2026-16624 is a critical missing authorization vulnerability in Cal.com Cal.diy, published on 22 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-639
Which versions are affected by CVE-2026-16624?
How do I fix CVE-2026-16624?
No fix has been published for CVE-2026-16624 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-16624 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16624 exists.
Sources
Also known as GHSA-4fwh-xxpv-xfm6, GHSA-72qw-2qpq-fg7j.