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    2 vulnerabilities found for io.modelcontextprotocol.sdk:mcp-core by modelcontextprotocol

    CVE-2026-108395 (GCVE-0-2026-108395)

    Vulnerability from nvd – Published: 2026-10-14 17:46 – Updated: 2026-10-14 19:29
    VLAI
    Title
    Model Context Protocol Java SDK HTTP server transports allow memory exhaustion through unbounded request bodies
    Summary
    The Model Context Protocol Java SDK is the official Java SDK for Model Context Protocol servers and clients. From version 0.8.0 through 0.12.0 in the io.modelcontextprotocol.sdk:mcp artifact, from 0.13.0 through 0.18.3 and 1.0.0 through 1.1.3 in io.modelcontextprotocol.sdk:mcp-core, and from mcp-core 2.0.0-M1 through 2.0.0, the Servlet-based SSE, Streamable HTTP, and Stateless server transports read an HTTP request body into memory without enforcing a maximum size. An unauthenticated remote client able to reach an affected transport can stream an arbitrarily large POST body, including with chunked transfer encoding, until the Java process exhausts its heap and becomes unavailable. Authentication, Origin or Host validation, or an upstream request-size limit can reject the request before the vulnerable read. The maintained mcp-core lines are fixed in versions 0.18.4, 1.1.4, and 2.0.1.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-14 19:28 UTC
    CWE
    • CWE-770 - Allocation of Resources Without Limits or Throttling
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7712 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    modelcontextprotocol io.modelcontextprotocol.sdk:mcp Affected: >= 0.8.0, < 0.13.0
    		Create a notification for this product.
    modelcontextprotocol io.modelcontextprotocol.sdk:mcp-core Affected: >= 0.13.0, < 0.18.4
    Affected: >= 1.0.0, < 1.1.4
    Affected: >= 2.0.0-M1, < 2.0.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-108395 (GCVE-0-2026-108395)

    Vulnerability from cvelistv5 – Published: 2026-10-14 17:46 – Updated: 2026-10-14 19:29
    VLAI
    Title
    Model Context Protocol Java SDK HTTP server transports allow memory exhaustion through unbounded request bodies
    Summary
    The Model Context Protocol Java SDK is the official Java SDK for Model Context Protocol servers and clients. From version 0.8.0 through 0.12.0 in the io.modelcontextprotocol.sdk:mcp artifact, from 0.13.0 through 0.18.3 and 1.0.0 through 1.1.3 in io.modelcontextprotocol.sdk:mcp-core, and from mcp-core 2.0.0-M1 through 2.0.0, the Servlet-based SSE, Streamable HTTP, and Stateless server transports read an HTTP request body into memory without enforcing a maximum size. An unauthenticated remote client able to reach an affected transport can stream an arbitrarily large POST body, including with chunked transfer encoding, until the Java process exhausts its heap and becomes unavailable. Authentication, Origin or Host validation, or an upstream request-size limit can reject the request before the vulnerable read. The maintained mcp-core lines are fixed in versions 0.18.4, 1.1.4, and 2.0.1.
    Severity
    7.5 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-14 19:28 UTC
    CWE
    • CWE-770 - Allocation of Resources Without Limits or Throttling
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7712 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    modelcontextprotocol io.modelcontextprotocol.sdk:mcp Affected: >= 0.8.0, < 0.13.0
    		Create a notification for this product.
    modelcontextprotocol io.modelcontextprotocol.sdk:mcp-core Affected: >= 0.13.0, < 0.18.4
    Affected: >= 1.0.0, < 1.1.4
    Affected: >= 2.0.0-M1, < 2.0.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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