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    CVE-2026-34237

    MCP Java SDK is the official Java SDK for Model Context Protocol servers and clients. Prior to versions 0.83.0, 1.0.1, and 1.1.1, there is a hardcoded wildcard CORS vulnerability. This issue has been patched in versions 0.83.0, 1.0.1, and 1.1.1.

    Published:Mar 31, 2026
    Last Modified:Jun 9, 2026
    EPS:Mar 31, 2026
    EPSS Score:0.00014
    CVSS Score:6.1

    Affected Products

    Vendor
    Lfprojects
    Product
    Mcp Java Sdk
    Vendor
    Modelcontextprotocol
    Product
    Java-sdk

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    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