--- title: "CVE-2026-108395: Model Context Protocol Java SDK - Denial of Service" description: "Model Context Protocol Java SDK 0.8.0 through 0.12.0 (mcp), 0.13.0 through 0.18.3 and 1.0.0 through 1.1.3 (mcp-core), and 2.0.0-M1 through 2.0.0 (mcp-core) contains a denial of service caused by unbounded HTTP request body reading in Servlet-based SSE, Streamable HTTP, and Stateless server transports, letting unauthenticated remote clients exhaust server heap memory, exploit requires network access to affected transports." url: https://panop.io/threat-heartbeat/CVE-2026-108395/ --- # CVE-2026-108395 Model Context Protocol Java SDK - Denial of Service Model Context Protocol Java SDK 0.8.0 through 0.12.0 (mcp), 0.13.0 through 0.18.3 and 1.0.0 through 1.1.3 (mcp-core), and 2.0.0-M1 through 2.0.0 (mcp-core) contains a denial of service caused by unbounded HTTP request body reading in Servlet-based SSE, Streamable HTTP, and Stateless server transports, letting unauthenticated remote clients exhaust server heap memory, exploit requires network access to affected transports. CVSS base score 7.5 /10 High CISA KEV Not listed Public exploit None known Authentication Not required [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-108395) ## Details Type Denial of Service Impact Denial Of Service CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Published 14 October 2026 Updated 15 October 2026 Weakness [CWE-770](https://cwe.mitre.org/data/definitions/770.html) ## Vendor fix Update to versions 0.18.4, 1.1.4, or 2.0.1 or later. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-108395](https://nvd.nist.gov/vuln/detail/CVE-2026-108395) - [https://github.com/modelcontextprotocol/java-sdk/releases/tag/v0.18.4](https://github.com/modelcontextprotocol/java-sdk/releases/tag/v0.18.4) - [https://github.com/modelcontextprotocol/java-sdk/releases/tag/v1.1.4](https://github.com/modelcontextprotocol/java-sdk/releases/tag/v1.1.4) - [https://github.com/modelcontextprotocol/java-sdk/releases/tag/v2.0.1](https://github.com/modelcontextprotocol/java-sdk/releases/tag/v2.0.1) - [https://github.com/modelcontextprotocol/java-sdk/security/advisories/GHSA-4x8c-5vv7-973f](https://github.com/modelcontextprotocol/java-sdk/security/advisories/GHSA-4x8c-5vv7-973f) - [https://github.com/modelcontextprotocol/java-sdk/commit/1499df22c7023aa257223143a5dcf5b1db7ef80d](https://github.com/modelcontextprotocol/java-sdk/commit/1499df22c7023aa257223143a5dcf5b1db7ef80d) - [https://github.com/modelcontextprotocol/java-sdk/commit/6a41dedaa0625551582d8247e5a4d78eae1131b2](https://github.com/modelcontextprotocol/java-sdk/commit/6a41dedaa0625551582d8247e5a4d78eae1131b2) - [https://github.com/modelcontextprotocol/java-sdk/commit/8c0fdd1b1f76adba3ce7945d29f73fa2ddc66598](https://github.com/modelcontextprotocol/java-sdk/commit/8c0fdd1b1f76adba3ce7945d29f73fa2ddc66598) - [https://github.com/modelcontextprotocol/java-sdk/commit/9e4d5fa827b6ba69457f5fd93573184789528efa](https://github.com/modelcontextprotocol/java-sdk/commit/9e4d5fa827b6ba69457f5fd93573184789528efa) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)