CVE-2026-16624

{
  "id": "CVE-2026-16624",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-22T19:16:58.273",
  "lastModified": "2026-10-24T13:10:00.147",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Cal.com OSS carece de autorización en la creación de teamId de webhook, permitiendo a cualquier usuario autenticado crear un webhook en cualquier equipo mediante la inyección de un teamId no validado, para luego robar datos de reserva, incluyendo campos como correos electrónicos de organizador/asistente y respuestas personalizadas, y, condicionalmente, contraseñas de videollamadas, al activar la entrega del webhook."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Cal.com",
          "product": "Cal.diy",
          "versions": [
            {
              "version": "0",
              "lessThan": "6.2.0",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
          "baseScore": 9.6,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 5.8
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-27T17:09:33.166013Z",
          "id": "CVE-2026-16624",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/calcom/cal.diy/security/advisories/GHSA-4fwh-xxpv-xfm6",
      "source": "[email protected]"
    },
    {
      "url": "https://vokecyber.com/research/calcom-cross-tenant-webhook-plant",
      "source": "[email protected]"
    },
    {
      "url": "https://vokecyber.com/research/calcom-cross-tenant-webhook-plant",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}