{"id":"CVE-2026-16624","state":"PUBLISHED","title":"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.","publishedAt":"2026-07-22T18:31:20.732Z","updatedAt":"2026-07-27T17:10:37.711Z","severity":{"score":9.6,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","source":"CISA-ADP"},"assigner":"certcc","products":["Cal.com Cal.diy"],"affected":[{"vendor":"Cal.com","product":"Cal.diy","versions":[{"version":"0","status":"affected","lessThan":"6.2.0","versionType":"custom"}]}],"references":["https://github.com/calcom/cal.diy/security/advisories/GHSA-4fwh-xxpv-xfm6","https://vokecyber.com/research/calcom-cross-tenant-webhook-plant"],"weaknesses":["CWE-639"],"ingestedAt":"2026-10-29T20:11:00.674Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/16xxx/CVE-2026-16624.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-16624","state":"PUBLISHED","datePublished":"2026-07-22T18:31:20.732Z","dateUpdated":"2026-07-27T17:10:37.711Z","assignerShortName":"certcc","assignerOrgId":"37e5125f-f79b-445b-8fad-9564f167944b","dateReserved":"2026-07-22T15:02:38.700Z"},"containers":{"cna":{"title":"CVE-2026-16624","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."}],"affected":[{"vendor":"Cal.com","product":"Cal.diy","versions":[{"version":"0","status":"affected","lessThan":"6.2.0","versionType":"custom"}]}],"references":[{"url":"https://github.com/calcom/cal.diy/security/advisories/GHSA-4fwh-xxpv-xfm6"},{"url":"https://vokecyber.com/research/calcom-cross-tenant-webhook-plant"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-639 Authorization Bypass Through User-Controlled Key"}]}],"providerMetadata":{"shortName":"certcc","orgId":"37e5125f-f79b-445b-8fad-9564f167944b","dateUpdated":"2026-07-22T18:31:30.694Z"},"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"VINCE 3.0.43","env":"prod","origin":"https://cveawg.mitre.org/api/cve/CVE-2026-16624"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://vokecyber.com/research/calcom-cross-tenant-webhook-plant","tags":["exploit"]}],"metrics":[{"cvssV3_1":{"scope":"CHANGED","version":"3.1","baseScore":9.6,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-07-27T17:09:33.166013Z","id":"CVE-2026-16624","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","type":"CWE","lang":"en","description":"CWE-639 Authorization Bypass Through User-Controlled Key"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-27T17:10:37.711Z"}}]}}}