This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-58211 →

DEBIAN-CVE-2026-58211

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 regis...

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 nats-server

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 nats-server

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 nats-server

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.14.3-1"}]}]

References

advisory security-tracker.debian.org