v4.17.1

puckeditor/puckv4.17.1Aug 31, 2026by github-actions[bot]

AI Summary

Enforces S256 PKCE (Proof Key for Code Exchange) for improved security in OAuth authentication flows.

Key Highlights

S256 PKCE requirement for CIMD clients

Full Release Notes

## [4.17.1](https://github.com/punkpeye/fastmcp/compare/v4.17.0...v4.17.1) (2026-08-31)


### Bug Fixes

* **oauth:** require S256 PKCE from CIMD clients ([#348](https://github.com/punkpeye/fastmcp/issues/348)) ([7016fa0](https://github.com/punkpeye/fastmcp/commit/7016fa0e09233f6cd4e249fe961d598382ac521e))