# NATS v2.15.0

> Networking & Messaging · 2026-09-17

This release adds JetStream operations and recovery capabilities, changes consumer and feature defaults, and improves replicated-stream performance. It also fixes leafnode isolation across cluster nodes.

## Action needed
- **[breaking]** The `js_raft_delete_range` feature enabled by default
  - The `js_raft_delete_range` feature is now enabled by default.

## Check if affected
- **[breaking]** The `max_consumers` and `default_max_consumers` limits
  - Applies if you use Streams.
  - Streams now have a default limit of 1000 consumers unless `max_consumers` is set in the stream configuration or account limits. The server-wide default can be overridden with `default_max_consumers` in the JetStream limits, or disabled by setting it to `-1`; existing consumers are unaffected.

## Other recorded changes
- 16 (added 9, value_changed 6, defect_corrected 1)

[Full analysis](https://ratatosk.io/en/releases/nats/v2.15.0)

[Original release notes](https://github.com/nats-io/nats-server/releases/tag/v2.15.0)