Incorrect Authorization Affecting nats-server package, versions <2.14.3-1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.29% (22nd percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-NATSSERVER-17816895
  • published4 Jul 2026
  • disclosed8 Jul 2026

Introduced: 4 Jul 2026

CVE-2026-58211  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Debian:unstable nats-server to version 2.14.3-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nats-server package and not the nats-server package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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, a client could be registered as the configured no_auth_user through a parser path used when the first client operation was not CONNECT, bypassing user-level connection restrictions such as allowed_connection_types or proxy_required that normal authentication would apply. This issue is fixed in versions 2.14.3 and 2.12.12.

CVSS Base Scores

version 3.1