Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-58250

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.12.8 and 2.11.17, an unauthenticated peer with network access to a leafnode listener with compression enabled could crash the server during the pre-authentication leafnode handshake by sending repeated leafnode INFO protocol messages before authentication and account setup completed. This issue is fixed in versions 2.12.8 and 2.11.17.
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-2026-58250


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