جزئیات آسیب‌پذیری

The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.10.0 until 1.30.0 and 2.2.0, ClientSession, ClientSessionGroup, and Client tool calls validate server-declared outputSchema documents with jsonschema's default resolver, causing an unresolved $ref value to fetch an HTTP, HTTPS, or file URL from the client's network and filesystem context. A server can trigger blind requests or local-file reads and can stall every session in the process because resolution runs synchronously on the event loop without a timeout. This issue is fixed in versions 1.30.0 and 2.2.0.

• https://github.com/modelcontextprotocol/python-sdk/security/advisories/GHSA-rwrf-2pqf-9j8j x_refsource_CONFIRM
• https://github.com/modelcontextprotocol/python-sdk/pull/3394 x_refsource_MISC
• https://github.com/modelcontextprotocol/python-sdk/pull/3396 x_refsource_MISC
• https://github.com/modelcontextprotocol/python-sdk/commit/5ebdfed4060d8e5b11b8e2348f86bad4d1fb8836 x_refsource_MISC
• https://github.com/modelcontextprotocol/python-sdk/commit/6705402e246dc4eb1fcdf4d9902b78d3c9c36e1b x_refsource_MISC
• https://github.com/modelcontextprotocol/python-sdk/releases/tag/v1.30.0 x_refsource_MISC
• https://github.com/modelcontextprotocol/python-sdk/releases/tag/v2.2.0 x_refsource_MISC