v2.12.11

vercel/streamdownv2.12.11Jun 9, 2026by github-actions[bot]

AI Summary

This release fixes a critical regression in JetStream where stale subject state tracking could cause 'Message Not Found' errors when specific message limits are configured. It also updates the Go runtime version to 1.25.11.

Key Highlights

Fixed JetStream regression causing 'Message Not Found' errors
Updated Go version to 1.25.11
Note: v2.14.x versions are not affected by the regression

New Features

JetStream stale state tracking fix
Go version upgrade

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