Skip to content
fr Sign in
8.8 High

CVE-2026-58253 NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system

Description

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.0, 2.12.7, and 2.11.16, when no_auth_user was configured, a parser fast path intended for ordinary client connections could also apply to route or leafnode listeners, allowing an unauthenticated peer to bypass inter-server CONNECT authentication and operate with the privileges associated with that connection type. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.

Affected products and versions

Product Affected versions Fixed in
nats-server 2.12 2.12.0-preview.1 → < 2.12.6 2.12.6
nats-server 2.11 earliest → < 2.11.16 2.11.16

References

Timeline

  1. Published
  2. Last modified

Other CVEs of nats-server

The 27 CVEs of nats-server →
CVE-2026-58208 NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system 6.8 Medium CVE-2026-58211 NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system 5.4 Medium CVE-2026-58207 NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system 7.7 High CVE-2026-58210 NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system 7.5 High
Track this CVE