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FastMCP

v4.3.1 Bugfix

This release fixes issues for SREs watching stability and regressions.

Published 1mo MCP Developer Tools
✓ No known CVEs patched
Read the diff → Tool health → What is this tool? →

✓ No known CVEs patched in this version

Topics

mcp sse

Affected surfaces

crypto_tls auth

Summary

AI summary

Fixed explicit authTagLength setting for AES-256-GCM cipher operations.

Full changelog

4.3.1 (2026-06-20)

Bug Fixes

  • add explicit authTagLength for AES-256-GCM cipher operations (#271) (9cee786)
View diff on GitHub

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About FastMCP

A high-level framework for building MCP servers in TypeScript

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Related context

Beta — feedback welcome: [email protected]