v4.12.6

punkpeye/fastmcpv4.12.6Aug 5, 2026by github-actions[bot]

AI Summary

Fixes a concurrency issue in authentication by ensuring refresh token mappings are consumed atomically during swap mode operations.

Key Highlights

Atomic consumption of refresh token mappings in swap mode
Bug fix reported by @JosephDoUrden

Full Release Notes

## [4.12.6](https://github.com/punkpeye/fastmcp/compare/v4.12.5...v4.12.6) (2026-08-05)


### Bug Fixes

* **auth:** consume refresh token mappings atomically in swap mode (reported by @JosephDoUrden) ([ce809e1](https://github.com/punkpeye/fastmcp/commit/ce809e156cf6dc2ecd27602058d789067ab0ee77))