Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-33218

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, a client which can connect to the leafnode port can crash the nats-server with a certain malformed message pre-authentication. Versions 2.11.15 and 2.12.6 contain a fix. As a workaround, disable leafnode support if not needed or restrict network connections to the leafnode port, if plausible without compromising the service offered.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 30.7%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-33218


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