CVE-2026-16624

State: Published
Severity: 9.6 Critical
Published: Jul 22, 2026
Updated: Jul 27, 2026
Reserved: Jul 22, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	9.6 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N	CISA-ADP

Weaknesses

CWE-639 Authorization Bypass Through User-Controlled Key

Affected Products

Product	Versions
Cal.diyCal.com	before 6.2.0Affected

References

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

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.