---
id: CVE-2026-108395
title: >-
  The Model Context Protocol Java SDK is the official Java SDK for Model Context
  Protocol servers and clients
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 …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-770
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T20:17:30.380'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-108395'
references:
  - url: >-
      https://github.com/modelcontextprotocol/java-sdk/commit/1499df22c7023aa257223143a5dcf5b1db7ef80d
    label: security-advisories@github.com
  - url: >-
      https://github.com/modelcontextprotocol/java-sdk/commit/6a41dedaa0625551582d8247e5a4d78eae1131b2
    label: security-advisories@github.com
  - url: >-
      https://github.com/modelcontextprotocol/java-sdk/commit/8c0fdd1b1f76adba3ce7945d29f73fa2ddc66598
    label: security-advisories@github.com
  - url: >-
      https://github.com/modelcontextprotocol/java-sdk/commit/9e4d5fa827b6ba69457f5fd93573184789528efa
    label: security-advisories@github.com
  - url: 'https://github.com/modelcontextprotocol/java-sdk/releases/tag/v0.18.4'
    label: security-advisories@github.com
  - url: 'https://github.com/modelcontextprotocol/java-sdk/releases/tag/v1.1.4'
    label: security-advisories@github.com
  - url: 'https://github.com/modelcontextprotocol/java-sdk/releases/tag/v2.0.1'
    label: security-advisories@github.com
  - url: >-
      https://github.com/modelcontextprotocol/java-sdk/security/advisories/GHSA-4x8c-5vv7-973f
    label: security-advisories@github.com
tags:
  - nvd
ingestedAt: '2026-10-14T18:47:39.311Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.