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.

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Fixes

Solution

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Workaround

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History

Thu, 30 Jul 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Calcom
Calcom cal.diy
Vendors & Products Calcom
Calcom cal.diy

Thu, 30 Jul 2026 09:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20
CWE-284

Mon, 27 Jul 2026 17:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-639
Metrics cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 23 Jul 2026 21:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20
CWE-284

Wed, 22 Jul 2026 18:45:00 +0000

Type Values Removed Values Added
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.
Title CVE-2026-16624
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2026-07-27T17:10:37.711Z

Reserved: 2026-07-22T15:02:38.700Z

Link: CVE-2026-16624

cve-icon Vulnrichment

Updated: 2026-07-27T17:07:49.648Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-02T17:45:02Z

Weaknesses