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    CVE-2026-25536

    MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients. From version 1.10.0 to 1.25.3, cross-client response data leak when a single McpServer/Server and transport instance is reused across multiple client connections, most commonly in stateless StreamableHTTPServerTransport deployments. This issue has been patched in version 1.26.0.

    Published:Feb 4, 2026
    Last Modified:Apr 17, 2026
    EPS:Feb 4, 2026
    EPSS Score:0.00014
    CVSS Score:7.1

    Affected Products

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

    Exploits

    No exploit reference

    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