v4.17.1

punkpeye/fastmcpv4.17.1Aug 31, 2026by github-actions[bot]

AI Summary

This release addresses a security requirement in the OAuth implementation by mandating S256 PKCE for CIMD clients. It resolves issue #348 to ensure better security compliance.

Key Highlights

Enforces S256 PKCE requirement for CIMD clients
Fixes OAuth security issue #348
Improves client security compliance

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))