Ambassador (Emissary) Releases

Latest: Emissary-ingress v4.1.0 · 19 May 2026 - 🎉 Emissary v4.1.0 🎉 Emissary-ingress is an open source, Kubernetes-native microservices API gateway built on the Envoy Proxy. Get started with Emissary-ingress - https://emissary-ingress.dev/docs/v4.1.0/quick-start/ View changelog - https://github.com/emissary-ingress/emissary/blob/v4.1.0/CHANGELOG.md Changes Update: Upgrade from Envoy 1.36.2 to Envoy 1.37.2 ( 1.37.0 release notes , 1.37.1 release notes , 1.37.2 release notes ). Fix: IR.check_deltas now forces a complete reconfigure whenever the cache is present but the incoming snapshot has no deltas. Previously, an empty-delta snapshot with a cached entry kept the stale entry around until another delta happened to arrive, which caused the Istio mTLS cert-rotation failure described in #4744 (thanks, Jonathan Bailey !).