Security Advisory

CVE-2026-58209

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-08 20:12:11

Last updated 2026-07-09 13:31:07

Assigner GitHub_M

CVSS score 4.3

State PUBLISHED

Description

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a subscriber configured subscribe deny rule because these delivery paths did not consistently recheck the concrete original topic before sending the MQTT PUBLISH to the subscriber. This issue is fixed in versions 2.14.3 and 2.12.12.

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