Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-58210

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.007
EPSS Ranking 50.1%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-58210


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