CVE-2026-16624

criticalCVSS 9.6covered by 1 sourcefirst seen 2026-07-22

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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Exploitation outlook

Low exploitation risk0.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalCVE-2026-16624: Cal.com OSS ships lacks authorization on webhook teamId creation, allowing any authenticated u…nvd · 2026-07-22

External references

NVD record for CVE-2026-16624

CVE.org record

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