Critical severity9.6NVD Advisory· Published Jul 22, 2026· Updated Jul 27, 2026

CVE-2026-16624

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Calcom/cal.diyllm-fuzzy
Calcom/Cal.comllm-fuzzy

Patches

Vulnerability mechanics

References

github.com/calcom/cal.diy/security/advisories/GHSA-4fwh-xxpv-xfm6nvd
vokecyber.com/research/calcom-cross-tenant-webhook-plantnvd

News mentions

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