v2.12.11

nats-io/nats-serverv2.12.11Jun 9, 2026by github-actions[bot]

AI Summary

This patch release resolves a regression introduced in v2.12.7 that caused 'Message Not Found' errors when a max messages per subject limit is configured. The fix is specific to the 2.12.x branch and does not affect v2.14.x versions.

Key Highlights

Fixed regression causing stale subject state tracking
Resolved 'Message Not Found' errors with max messages per subject
Note that v2.14.x versions are not affected by this issue

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