- Decoupled JetStream Raft transport and increased disk concurrency semaphore to 4096 (configurable via max_concurrent_io) to improve performance and memory handling;
- Fixed several security issues including TLS authentication bypass, JWT validation crashes, and added stricter validation for cluster replicated messages and stream snapshots;
- Implemented numerous bug fixes and optimizations such as faster AVL sequence set operations, reduced subject tracking memory, corrected healthz/varz reporting, monotonic MQTT packet IDs, and consumer/stream handling improvements.
Release v2.12.14
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
Decoupled Raft transport and increased disk concurrency (now configurable) with several JetStream performance and memory optimizations;
Fixed numerous bugs and race conditions across authentication, routing, monitoring, JetStream, Raft, and MQTT, preventing panics, memory leaks, and stream desynchronisation.
Fixed numerous race conditions, panics, and data‑race issues across authentication, routing, monitoring, JetStream, and Raft, improving stability and security.