- Introduced a new routing protocol with accounts, multi‑tenancy, NKey/JWT authentication, gateways, leaf nodes and TLS enhancements; not compatible with servers < 2.0.0 and requires import path change to /v2.
- Added numerous features such as cluster/route permissions, lame‑duck mode, custom auth reload, TLS server‑name handling, varz extensions, unquoted numeric strings, and performance optimizations.
- Fixed critical issues including misleading “Slow Consumer” messages during TLS handshakes, payload overruns, configuration parsing crashes, and added security warnings for plaintext passwords.
Release v2.0.0
Official NATS changelog summary with source attribution, release tags, and community reactions.
Track this NATS release note alongside related changelog updates, risky changes, and weekly digest signals from the developer community.
Verify the original release note
Every summary should remain traceable to the original changelog or release source.
Follow this in context
Turn this NATS release note into a weekly digest for the tools you actually use.
Create digestMore NATS changelog updates
Added Leafnodes support with a configurable dial timeout option for high‑latency links
Upgrade to Go 1.25.12 and bump critical dependencies (klauspost/compress v1.19.2, golang.org/x/crypto v0.55.0).
Decoupled Raft transport and increased disk concurrency (now configurable) with several JetStream performance and memory optimizations;