CVE-2026-16624
9.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Cal.com | Cal.diy | 0 < 6.2.0 | affected |
Weaknesses
- CWE-639 Authorization Bypass Through User-Controlled Key
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: no
- Technical Impact: total
Additional References
References
- https://github.com/calcom/cal.diy/security/advisories/GHSA-4fwh-xxpv-xfm6
- https://vokecyber.com/research/calcom-cross-tenant-webhook-plant
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