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Title: confused deputy fix in example + supporting sdk changes by pcarleton · Pull Request #648 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: confused deputy fix in example + supporting sdk changes by pcarleton · Pull Request #648 · modelcontextprotocol/python-sdk

X Title: confused deputy fix in example + supporting sdk changes by pcarleton · Pull Request #648 · modelcontextprotocol/python-sdk

Description: Motivation and Context See the confused deputy consideration here: https://github.com/modelcontextprotocol/modelcontextprotocol/blob/c255349bd98d9dc73f3579c828d195bd09c0bee8/docs/specification/draft/basic/security_best_practices.mdx#21-confused-deputy-problem In the example, we front the Github API, so we need to put a consent screen for each new client registration, otherwise the Github consent screen will be skipped for new clients, creating a path for token leakage. Still TODO: make the has_consent functions optional (currently every provider needs to implement them) allow overriding consent handler (currently always uses the default one) consider keeping consent handler abstract in the SDK, and putting example impl into the example directory Here's what the consent screen looks like: How Has This Been Tested? Tested using inspector to run through auth flow w/ consent required w/o consent required Breaking Changes Types of changes Bug fix (non-breaking change which fixes an issue) New feature (non-breaking change which adds functionality) Breaking change (fix or feature that would cause existing functionality to change) Documentation update Checklist I have read the MCP Documentation My code follows the repository's style guidelines New and existing tests pass locally I have added appropriate error handling I have added or updated documentation as needed Additional context

Open Graph Description: Motivation and Context See the confused deputy consideration here: https://github.com/modelcontextprotocol/modelcontextprotocol/blob/c255349bd98d9dc73f3579c828d195bd09c0bee8/docs/specification/dra...

X Description: Motivation and Context See the confused deputy consideration here: https://github.com/modelcontextprotocol/modelcontextprotocol/blob/c255349bd98d9dc73f3579c828d195bd09c0bee8/docs/specification/dra...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/648

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confused deputy fix in example + supporting sdk changes https://github.com/modelcontextprotocol/python-sdk/pull/648/files#top
Show all changes 8 commits https://github.com/modelcontextprotocol/python-sdk/pull/648/files
99d7735 first cut at a per-client consent flow pcarleton May 2, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/648/commits/99d77357b14e64a55af37442a00bbd6a48a60247
15ecf73 add consent pcarleton May 7, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/648/commits/15ecf7319a77c3137ed5aec89703f115580aaa95
e05f0b6 make consent optional, default true pcarleton May 7, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/648/commits/e05f0b6f27a422cbf49ba4b0ae52c499aea4dafa
2a8e67b default client consent to false to preserve backwards compatibility pcarleton May 7, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/648/commits/2a8e67ba2a8248b915b7b2b5396a19abb00640b4
011fd07 require consent in example pcarleton May 7, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/648/commits/011fd078b001c369e3a10aa76c079c3e9599739a
429c28f move consent to example pcarleton May 7, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/648/commits/429c28f2bec15d51f2e859d24c6be98c9132c30f
9439a4c more cleanup pcarleton May 7, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/648/commits/9439a4c65fee2fde27110eddb5c20ec3ee88255b
48eb13d more cleanup pcarleton May 7, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/648/commits/48eb13d0c459a7abf6362b9926b727715d7e286b
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