Model Context Protocol Java SDK HTTP server transports allow memory exhaustion through unbounded request bodies
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
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| modelcontextprotocol | io.modelcontextprotocol.sdk:mcp | affected |
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| modelcontextprotocol | io.modelcontextprotocol.sdk:mcp-core | affected |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.608% probability within 30 days)
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ssvc
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| Description | 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. | |
| Title | Model Context Protocol Java SDK HTTP server transports allow memory exhaustion through unbounded request bodies | |
| Weaknesses | CWE-770 | |
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cvssV3_1
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