v2.12.11

deepseek-ai/DeepSeek-Coder-V2v2.12.11Jun 9, 2026by github-actions[bot]

AI Summary

A maintenance release fixing a regression in JetStream that could cause stale subject state tracking and 'Message Not Found' errors when subject limits are configured.

Key Highlights

Fixed JetStream regression causing stale subject state tracking
Addresses 'Message Not Found' errors with max messages per subject limits
Maintains backwards compatibility with 2.11.x versions

New Features

JetStream bug fix for subject state tracking

Full Release Notes

## Changelog

Refer to the [2.12 Upgrade Guide](https://docs.nats.io/release-notes/whats_new/whats_new_212) for backwards compatibility notes with 2.11.x.

### Go Version

- 1.25.11

### Fixed

JetStream

- Fixed a regression introduced in v2.12.7 which could result in stale subject state tracking which could manifest in "Message Not Found" errors when a max messages per subject limit is configured (#8285)
  - Please note that v2.14.x versions are not affected

### Complete Changes
 
https://github.com/nats-io/nats-server/compare/v2.12.10...v2.12.11