CVE-2026-109527Published

Model Context Protocol Python SDK HTTP and OAuth endpoints allow memory exhaustion through unbounded request bodies

Exact source revision recorded 23 Oct 2026 15:48:27 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-109527

Published

python-sdk

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "modelcontextprotocol",
                    "product": "python-sdk",
                    "versions": [
                        {
                            "version": "< 1.29.1",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2.0.0a1, < 2.1.0",
                            "status": "affected"
                        }
                    ]
                }

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