nats-server: NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system
CVE-2026-58210 is fixed in nats-server on 1 platform by DEBIAN-CVE-2026-58210 (version 2.14.3-1), released July 6, 2026. It is not reported as exploited. Patch Radar priority: High.
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, an unauthenticated MQTT client could cause the server to retain large incomplete MQTT CONNECT packets before authentication completed, consuming server memory while the parser waited for the advertised MQTT packet length. This issue is fixed in versions 2.14.3 and 2.12.12.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| nats-server · Debian 14 | 2.14.3-1 | DEBIAN-CVE-2026-58210 | Jul 6, 2026 |
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