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    CVE-2026-90474

    MCPHub before 1.0.32 contains an authentication bypass vulnerability in its embedded OAuth 2.0 authorization server where client authentication is disabled by default and PKCE enforcement is optional. Attackers who obtain an authorization code through interception can redeem it for access tokens without providing a client secret or PKCE verifier, gaining access to victim accounts and their privileges.

    Published:Sep 12, 2026
    Last Modified:Sep 15, 2026
    EPS:Sep 12, 2026
    EPSS Score:0.003
    CVSS Score:6.8

    Affected Products

    Vendor
    Samanhappy
    Product
    Mcphub

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-287 Improper Authentication

    Related CVEs

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    CVE-2026-79746 (CVSS 8.1) — MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into se…
    CVE-2026-79747 (CVSS 7.1) — MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into se…
    CVE-2026-79748 (CVSS 9.9) — MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into se…
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    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