CVE-2026-58210

CVE-2026-58210 affects NATS Server prior to versions 2.14.3 and 2.12.12. An unauthenticated MQTT client could cause the server to retain large incomplete MQTT CONNECT packets before authentication completes, exhausting memory due to the parser waiting for the advertised MQTT packet length. The is...

CVE-2026-58210 NATS Server: MQTT partial CONNECT packets can exhaust pre-auth memory

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...