Big Bang 4.0: The Next Evolution of the Platform
Big Bang 4.0 is planned for October 2026. This release brings together sustained work across the Big Bang value stream to make secure Kubernetes platforms easier to operate, configure, and extend.
2026¶
Istio Ambient Mesh in Big Bang: From Beta to GA
Update: Istio Ambient Mesh reached General Availability in Big Bang 3.32. It remains opt-in throughout Big Bang 3.x and becomes the default Istio configuration in Big Bang 4.0. Follow the prescribed upgrade sequence: upgrade to 3.35.1 first, then upgrade to 4.0 with Ambient enabled and the unified package and
bb-commonvalues migrations applied. See the 4.0 migration guide.