CVE-2026-116686Published
Model Context Protocol Python SDK: Client fetched server-chosen $ref URLs while validating tool results against output schemas
Exact source revision recorded 27 Oct 2026 20:45:55 UTC. It does not establish the source's current position. Latest evidence.
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CVE-2026-116686 · Microsoft / collected KEV context
cve-program · CVE-2026-116686
- https://github.com/modelcontextprotocol/python-sdk/security/advisories/GHSA-rwrf-2pqf-9j8j
- https://github.com/modelcontextprotocol/python-sdk/pull/3394
- https://github.com/modelcontextprotocol/python-sdk/pull/3396
- https://github.com/modelcontextprotocol/python-sdk/commit/5ebdfed4060d8e5b11b8e2348f86bad4d1fb8836
- https://github.com/modelcontextprotocol/python-sdk/commit/6705402e246dc4eb1fcdf4d9902b78d3c9c36e1b
- https://github.com/modelcontextprotocol/python-sdk/releases/tag/v1.30.0
- https://github.com/modelcontextprotocol/python-sdk/releases/tag/v2.2.0
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