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    CVE-2026-63768

    cal.diy through 6.2.0 contains an open redirect vulnerability in the conferencing OAuth callback endpoint that allows attackers to redirect users to arbitrary URLs by crafting malicious state parameters. Attackers can exploit the unsigned state parameter and onErrorReturnTo field to silently redirect visitors from the trusted domain to attacker-controlled URLs for phishing attacks.

    Published:Jul 20, 2026
    Last Modified:Jul 20, 2026
    EPS:Jul 20, 2026
    EPSS Score:
    CVSS Score:4.3

    Affected Products

    Vendor
    Calcom
    Product
    Cal.diy

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-178 Cross-Site Flashing

    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-2026-9349 (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