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    CVE-2026-9303

    A vulnerability was identified in calcom cal.diy up to 4.9.4. Impacted is an unknown function. The manipulation leads to cross-site request forgery. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

    Published:May 23, 2026
    Last Modified:May 26, 2026
    EPS:May 23, 2026
    EPSS Score:0.00017
    CVSS Score:4.3

    Affected Products

    Vendor
    Calcom
    Product
    Cal.diy

    Exploits

    No exploit reference

    Related CVEs

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    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-2026-16624 (CVSS 9.6) — Cal.com OSS ships lacks authorization on webhook teamId creation, allowing any authenticated user to create a …
    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…

    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