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CVE-2026-108395

CVE.org · Published

Historical CVEsJSONAI instructions

Record status
Published
Identifier year (not publication year)
2026
Source publication
Source updated
Imported by cveboard
Source snapshot
cve_2026-10-24_midnight_baseline ·

Plain text

CNA source text (English)

Model Context Protocol Java SDK HTTP server transports allow memory exhaustion through unbounded request bodies

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.

Scoped product and version facts

Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.

Exploitation unknown; this catalogue does not assess exploitation.

io.modelcontextprotocol.sdk:mcp

Vendor
modelcontextprotocol
Product
io.modelcontextprotocol.sdk:mcp
Platforms
Unknown
Default status
Unknown
io.modelcontextprotocol.sdk:mcp · Scoped product and version facts
Version (version)Status (status)Version scheme (versionType)Exclusive end (lessThan)Inclusive end (lessThanOrEqual)Status changes (at → status)
>= 0.8.0, < 0.13.0affectedUnavailableUnavailableUnavailableNone listed

io.modelcontextprotocol.sdk:mcp-core

Vendor
modelcontextprotocol
Product
io.modelcontextprotocol.sdk:mcp-core
Platforms
Unknown
Default status
Unknown
io.modelcontextprotocol.sdk:mcp-core · Scoped product and version facts
Version (version)Status (status)Version scheme (versionType)Exclusive end (lessThan)Inclusive end (lessThanOrEqual)Status changes (at → status)
>= 0.13.0, < 0.18.4affectedUnavailableUnavailableUnavailableNone listed
>= 1.0.0, < 1.1.4affectedUnavailableUnavailableUnavailableNone listed
>= 2.0.0-M1, < 2.0.1affectedUnavailableUnavailableUnavailableNone listed