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v2.14.2

umami-software/umamiv2.14.2Jun 2, 2026by github-actions[bot]

AI Summary

This release updates the Go version to 1.26.3 and introduces the Client ID to the embedded ClientAuthentication API. It includes significant stability fixes for JetStream, including Raft peer tracking, filestore performance, and consumer lock handling, alongside general protocol and WebSocket improvements.

Key Highlights

  • Go 1.26.3 update
  • Client ID now available through ClientAuthentication API
  • Fixed race conditions in subscription handling
  • Fixed protocol-level corruption in WebSocket clients
  • Improved JetStream filestore performance

New Features

  • Client ID available through ClientAuthentication API

Full Release Notes

## Changelog

Refer to the [2.14 Upgrade Guide](https://docs.nats.io/release-notes/whats_new/whats_new_214) for backwards compatibility notes with 2.12.x. Please note that the 2.13.x version was skipped.

### Go Version

- 1.26.3

### Dependencies

- golang.org/x/crypto v0.52.0
- golang.org/x/sys v0.45.0
- github.com/nats-io/jwt/v2 v2.8.2
- github.com/nats-io/nkeys v0.4.16

### Improved

General

- The client ID is now available through the embedded `ClientAuthentication` API (#8217)

### Fixed

General

- A race condition when handling subscription interest over routes has been fixed (#8235)
- Potential protocol-level corruption from rewriting `$JS.ACK` subjects has been fixed (#8242)
- Potential protocol-level corruption from buffer misuse in compressed WebSocket clients has been fixed (#8244)
- The `/accstatz` monitoring endpoint no longer omits accounts with only leaf connections (#8252)

JetStream

- Fixed a case where Raft peers were not correctly tracked after an inactivity stall during catchup (#8226)
- Quorum needed is now calculated correctly when bootstrapping the metalayer when gateway URLs resolve to multiple IP addresses (#8238)
- The filestore no longer performs a block skip check on streams with extremely high subject counts, as it could result in runaway CPU usage (#8227)
- Fixed a case where the filestore would not release a lock after handling a write error (#8232)
- Purge operations on both file and memory stores are now more consistent with each other (#8241)
- Fixed a case where the consumer lock would not release a lock after handling a start sequence error (#8230)
- Counter streams and message schedules now have configuration constraints applied to prevent incorrect usage patterns (#8240)
- Improved stream and consumer scale down behaviour consistency (#8253)
- Fixed an issue where the per-subject state last block was not stored correctly with a max messages per subject limit of 1 (#8254)
- Fixed a drift that could occur in the peer sets after a peer remove of an online node (#8258)

### Complete Changes
 
https://github.com/nats-io/nats-server/compare/v2.14.1...v2.14.2