v4.19.1

hexgrad/kokorov4.19.1Sep 4, 2026by github-actions[bot]

AI Summary

Addresses critical bugs in authentication response handling and optimizes the authentication process for HTTP stream requests to prevent memory leaks and improve efficiency.

Key Highlights

Cancel CIMD response body on early-return paths
Authenticate once per httpStream request
Bug fixes in auth and http modules

Full Release Notes

## [4.19.1](https://github.com/punkpeye/fastmcp/compare/v4.19.0...v4.19.1) (2026-09-04)


### Bug Fixes

* **auth:** cancel CIMD response body on early-return paths ([#354](https://github.com/punkpeye/fastmcp/issues/354)) ([5b68657](https://github.com/punkpeye/fastmcp/commit/5b68657dad4901e2e92236df472e7f1d56002cef))
* **http:** authenticate once per httpStream request ([#355](https://github.com/punkpeye/fastmcp/issues/355)) ([da55e21](https://github.com/punkpeye/fastmcp/commit/da55e21bef831afefaccdbc5e7af79c47de171cf))