---
title: "@modelcontextprotocol/server — CVE-2026-111770"
description: "A security flaw affects the npm package @modelcontextprotocol/server. Affected versions: >= 2.0.0, < 2.3.0. Fixed from version 2.3.0. CVSS score 7.7."
canonical: https://inyourgeek.com/en/failles-de-securite/2026-10-20-cve-2026-111770
type: faille-de-securite
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-10-20
dateModified: 2026-10-20
---
# @modelcontextprotocol/server — CVE-2026-111770

A security flaw affects the npm package @modelcontextprotocol/server. Affected versions: >= 2.0.0, < 2.3.0. Fixed from version 2.3.0. CVSS score 7.7.

## What to do

Update @modelcontextprotocol/server to 2.3.0 or later.

| Fact | Value |
| --- | --- |
| Package | @modelcontextprotocol/server |
| Ecosystem | npm (JavaScript) |
| Class | Other |
| Affected versions | >= 2.0.0, < 2.3.0 |
| Fixed version | 2.3.0 |
| CVSS | 7.7 |
| CVE | CVE-2026-111770 |
| GHSA | GHSA-jm63-cq47-j5jp |
| Published on | October 20, 2026 |
| Severity | High |

## Sources

- [GitHub Security Advisory — GHSA-jm63-cq47-j5jp](https://github.com/advisories/GHSA-jm63-cq47-j5jp) — GitHub Security Advisories
- [NVD — CVE-2026-111770](https://nvd.nist.gov/vuln/detail/CVE-2026-111770) — NVD

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