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Message data corrupted with route protocol metadata [v2.12.4]

defectSuspected defect such as a bug or regressionSuspected defect such as a bug or regression

Status: Open.

#7842 In nats-io/nats-server;

· superlevure opened on Feb 17, 2026

Nats Server Crash when mismatched JWT/Seed is used in decentralized auth callout

defectSuspected defect such as a bug or regressionSuspected defect such as a bug or regression

Status: Open.

#7841 In nats-io/nats-server;

· acormier-maia opened on Feb 17, 2026

nats_consumer_ack_floor_stream_seq temporarily differs across cluster nodes

defectSuspected defect such as a bug or regressionSuspected defect such as a bug or regression

Status: Open.

#7838 In nats-io/nats-server;

· Vlad-Zaytsev opened on Feb 17, 2026

Stream snapshot silently omits consumers with fewer replicas

defectSuspected defect such as a bug or regressionSuspected defect such as a bug or regression

Status: Open.

#7829 In nats-io/nats-server;

· johnweldon opened on Feb 13, 2026

MQTT client login failing with bearer JWT signed by scoped signing key

defectSuspected defect such as a bug or regressionSuspected defect such as a bug or regression

Status: Open.

#7823 In nats-io/nats-server;

· roeschter opened on Feb 13, 2026

JetStream: DeliverLastPerSubject with MaxMsgsPerSubject causes stream lock-up on sparse sequence ranges

defectSuspected defect such as a bug or regressionSuspected defect such as a bug or regression

Status: Open.

#7821 In nats-io/nats-server;

· antonbarchukov opened on Feb 13, 2026

Messages Lost with JetStream, work-queue Retention and R3 on max-deliver reached [v2.12.4, v2.12.3]

defectSuspected defect such as a bug or regressionSuspected defect such as a bug or regression

Status: Open.

#7817 In nats-io/nats-server;

· jgriegershs opened on Feb 11, 2026

JetStream message duplication

defectSuspected defect such as a bug or regressionSuspected defect such as a bug or regression

Status: Open.

#7801 In nats-io/nats-server;

· ZickZakk opened on Feb 6, 2026

JetStream sourced streams occasionally duplicate messages with identical Nats-Stream-Source

defectSuspected defect such as a bug or regressionSuspected defect such as a bug or regression

Status: Open.

#7796 In nats-io/nats-server;

· superspartak opened on Feb 4, 2026

Stream replicas stuck in <code>UNSYNCED</code> state leading to undeleted messages [v2.12.3]

defectSuspected defect such as a bug or regressionSuspected defect such as a bug or regression

Status: Open.

#7791 In nats-io/nats-server;

· superlevure opened on Feb 3, 2026

Undocumented Request Payload Type JSApiStreamPurgeRequest

Status: Open.

#7777 In nats-io/nats-server;

· Whadup opened on Jan 28, 2026

Regression with MQTT clients - Cross User QoS 1 delivery

defectSuspected defect such as a bug or regressionSuspected defect such as a bug or regression

Status: Open.

#7694 In nats-io/nats-server;

· persinac opened on Jan 5, 2026