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    CVE-2026-16624

    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.

    Published:Jul 22, 2026
    Last Modified:Jul 30, 2026
    EPS:Jul 22, 2026
    EPSS Score:0.00281
    CVSS Score:9.6

    Affected Products

    Vendor
    Calcom
    Product
    Cal.diy

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2025-71389 (CVSS 10) — Cal.com (calcom/cal.diy) before 5.9.9 is vulnerable to unauthenticated remote code execution because it bundle…
    CVE-2024-58355 (CVSS 9.3) — Cal.com (calcom/cal.diy) versions through 4.7.15 contain a stored cross-site scripting vulnerability. The sing…
    CVE-2024-58354 (CVSS 8.5) — cal.com (calcom repository, later renamed cal.diy) is affected by a repository takeover vulnerability in its G…
    CVE-2024-58353 (CVSS 9.3) — Cal.com (repository calcom/cal.diy) in versions <= 4.7.15 is vulnerable to cross-site scripting (XSS) on the p…
    CVE-2026-63768 (CVSS 5.3) — cal.diy through 6.2.0 contains an open redirect vulnerability in the conferencing OAuth callback endpoint that…
    CVE-2026-9349 (CVSS 5.5) — A vulnerability was determined in calcom cal.diy up to 4.9.4. Affected by this issue is the function getServer…
    CVE-2026-9304 (CVSS 1.3) — A security flaw has been discovered in calcom cal.diy up to 4.9.4. The affected element is the function valida…
    CVE-2026-9303 (CVSS 2.1) — A vulnerability was identified in calcom cal.diy up to 4.9.4. Impacted is an unknown function. The manipulatio…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High