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v4.16.11

punkpeye/fastmcpv4.16.11Aug 27, 2026by github-actions[bot]

AI Summary

Enhances session reliability by making teardown processes fail-safe and preventing unauthorized reinitialization attempts.

Key Highlights

  • Make session teardown fail-safe
  • Reject reinitializing active sessions
  • Serialize session pings

Full Release Notes

## [4.16.11](https://github.com/punkpeye/fastmcp/compare/v4.16.10...v4.16.11) (2026-08-27)


### Bug Fixes

* **edge:** make session teardown fail-safe ([#340](https://github.com/punkpeye/fastmcp/issues/340)) ([9098a93](https://github.com/punkpeye/fastmcp/commit/9098a93ab154fd2e44768f3e0a83bd655d800e6e))
* **edge:** reject reinitializing active sessions ([#339](https://github.com/punkpeye/fastmcp/issues/339)) ([565c4a2](https://github.com/punkpeye/fastmcp/commit/565c4a2f41283e16c300a9d1d7cc9eb75fd379dc))
* serialize session pings ([#338](https://github.com/punkpeye/fastmcp/issues/338)) ([4ed9ce2](https://github.com/punkpeye/fastmcp/commit/4ed9ce2381a8601c18beeb6c3b2119925a3cadd7))