PT-2026-56583 · Nats.Io · Nats Server
Published
2026-07-08
·
Updated
2026-07-08
·
CVE-2026-58211
CVSS v3.1
5.4
Medium
| Vector | AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
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.
Fix
Incorrect Authorization
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Weakness Enumeration
Related Identifiers
Affected Products
Nats Server