v4.12.7

punkpeye/fastmcpv4.12.7Aug 7, 2026by github-actions[bot]

AI Summary

Implements constant-time comparison for PKCE challenge validation to mitigate timing attacks.

Key Highlights

Uses constant-time comparison for PKCE
Security hardening for auth

Full Release Notes

## [4.12.7](https://github.com/punkpeye/fastmcp/compare/v4.12.6...v4.12.7) (2026-08-07)


### Bug Fixes

* **auth:** use a constant-time comparison for the PKCE challenge ([#313](https://github.com/punkpeye/fastmcp/issues/313)) ([17effd8](https://github.com/punkpeye/fastmcp/commit/17effd8624c2b2c23c07704bed2c4353a000d834))