4.5.4

Automattic/harper4.5.4May 31, 2026by blckmn

AI Summary

A maintenance release for Betaflight version 4.5.4 that backports critical stability fixes from the newer 2025.12 branch, specifically targeting CLI command race conditions and configuration validation.

Key Highlights

Backported CLI MSP race-condition fix
Backported unconditionally clamp failsafe_procedure fix

Full Release Notes

<!-- Release notes generated using configuration in .github/release.yml at 4.5-maintenance -->

## What's Changed
### Fixes
* [4.5.4] Backport CLI MSP race-condition fix (#15193) by @blckmn in https://github.com/betaflight/betaflight/pull/15200
* [backport] fix(config): unconditionally clamp failsafe_procedure to valid range by @nerdCopter in https://github.com/betaflight/betaflight/pull/15190


**Full Changelog**: https://github.com/betaflight/betaflight/compare/4.5.3...4.5.4