Issues

• The MQTT Will of a client that is still connected when nats-server shuts down gracefully (SIGTERM or lame-duck mode) is never published.

  defect
  nats-io/nats-server#8706 · Filter by author nejeoui opened on Oct 3, 2026

• High CPU usage on 10K leaf nodes

  defect
  nats-io/nats-server#8705 · Filter by author mhghw opened on Oct 3, 2026
  2

• Does JetStream InactiveThreshold intentionally restart at server boot?

  defect
  nats-io/nats-server#8704 · Filter by author nejeoui opened on Oct 3, 2026

• Memory leak after dynamic config reload

  defect
  nats-io/nats-server#8697 · Filter by author alyssaruth opened on Oct 2, 2026
  1

• Clustered stream restore failure leaves an orphaned Raft node, and a later re-restore of the same stream can silently disappear [v2.12.15]

  nats-io/nats-server#8687 · Filter by author codyps opened on Sep 30, 2026
  3

• Termination of a deleted pending message acks all messages below it under AckPolicy All

  defect
  nats-io/nats-server#8648 · Filter by author JustDimus-Veeam opened on Sep 25, 2026
  3

• firstMatching silently skips a record that fails its checksum

  defect
  nats-io/nats-server#8632 · Filter by author nberlee opened on Sep 21, 2026
  7

• Subject mappings - account-hash() function

  proposal
  nats-io/nats-server#8631 · Filter by author roeschter opened on Sep 21, 2026
  4

• JetStream: ~20s delivery delays through sourced streams after native pool-placement migration

  defect
  nats-io/nats-server#8619 · Filter by author CharvN opened on Sep 18, 2026
  2

  

• Stream sourcing throughput capped at ~20K msg/s by a single goroutine

  proposal
  nats-io/nats-server#8612 · Filter by author kaushalaroraharman opened on Sep 17, 2026
  3

• MQTT topics with whitespace cause client disconnects

  proposal
  nats-io/nats-server#8611 · Filter by author nilseckert opened on Sep 17, 2026

• Jetstream: PATCH operation for adding a source to a stream

  proposal
  nats-io/nats-server#8607 · Filter by author ordeneaux opened on Sep 16, 2026
  6

• Discovery timeout to chanve severity level for route connections messages.

  proposal
  nats-io/nats-server#8596 · Filter by author muchologo opened on Sep 13, 2026

• Memory leak in STATSZ on windows if the process cannot read performance counters

  defect
  nats-io/nats-server#8588 · Filter by author mattg23 opened on Sep 10, 2026

• Cross-account import interest is permanently lost when an account is introduced by config reload in a cluster

  defect
  nats-io/nats-server#8560 · Filter by author gedemagt opened on Sep 3, 2026
  3

• Sustained append-latency degradation on a full DiscardOld stream under concurrent filtered-consumer scans

  nats-io/nats-server#8552 · Filter by author daniel-yu-airspace-intelligence opened on Sep 2, 2026
  1

• Trojan Wacatec.B!ml detected by Windows Defender in nats-server-v2.14.6-windows-amd64.zip

  defect
  nats-io/nats-server#8531 · Filter by author JonathonQuinn opened on Aug 28, 2026
  2

• KV: TTL-purged values are revived by filestore rebuild after unclean shutdown on R1 streams

  defect
  nats-io/nats-server#8505 · Filter by author kumorid opened on Aug 24, 2026
  1

  

• JetStream memory footprint grows with subject & dedup cardinailty despite storageType=File

  defect
  nats-io/nats-server#8485 · Filter by author davidmcote opened on Aug 19, 2026
  1

• Snapshot install compacts the Raft log before the store data it covers is durable

  stale
  nats-io/nats-server#8425 · Filter by author miotte opened on Jul 27, 2026

• CONSUMER.RESET response silently dropped across a service import (same-client no-echo check) — cross-account source/mirror bind-by-name hangs at active: -1

  stale
  nats-io/nats-server#8411 · Filter by author omer9564 opened on Jul 23, 2026
  4

• Allow verify_and_map to derive identity from any certificate attribute, not just email/SAN/DN

  proposalstale
  nats-io/nats-server#8393 · Filter by author edjeffreys opened on Jul 17, 2026

• jetstream sequence inconsistent with actual message order

  defectstale
  nats-io/nats-server#8368 · Filter by author f7d1g opened on Jul 8, 2026

• Flaky TestRegisterAndUnregister due to asynchronous ATS goroutine shutdown

  defectstale
  nats-io/nats-server#8363 · Filter by author zhengshi1998 opened on Jul 7, 2026

• Allow stream, consumer & account names to contain arbitrary characters by encoding pathnames

  proposalstale
  nats-io/nats-server#8352 · Filter by author matthewadams opened on Jul 3, 2026