CVE-2026-111771Published

Model Context Protocol TypeScript SDK: Server bearer authentication accepted tokens issued for another service

Exact source revision recorded 5 Nov 2026 22:36:54 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-111771

Published

typescript-sdk

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "modelcontextprotocol",
                    "product": "typescript-sdk",
                    "versions": [
                        {
                            "version": ">= 1.6.0, < 1.32.0",
                            "status": "affected"
                        }
                    ]
                }

sdk

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "@modelcontextprotocol",
                    "product": "sdk",
                    "versions": [
                        {
                            "version": ">= 1.6.0, < 1.32.0",
                            "status": "affected"
                        }
                    ]
                }

server

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "@modelcontextprotocol",
                    "product": "server",
                    "versions": [
                        {
                            "version": ">= 2.0.0, < 2.3.0",
                            "status": "affected"
                        }
                    ]
                }

express

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "@modelcontextprotocol",
                    "product": "express",
                    "versions": [
                        {
                            "version": ">= 2.0.0, < 2.0.2",
                            "status": "affected"
                        }
                    ]
                }

server-legacy

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "@modelcontextprotocol",
                    "product": "server-legacy",
                    "versions": [
                        {
                            "version": ">= 2.0.0, < 2.3.1",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON