cvedb.io
CVE-2026-58209
MEDIUM · CVSS 4.3
EPSS exploitation probability: 0%
Published 2026-07-08T20:16:53.800 · Last modified 2026-07-08T20:16:53.800

Summary

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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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.