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8.6High

CVE-2026-33216NATS has MQTT plaintext password disclosure

nats-io nats-server; Red Hat Multicluster Global Hub 1.4.5; Red Hat Multicluster Global Hub 1.6.5; Red Hat Red Hat multicluster global hub 1.5.3 Published: (7 months ago)

Description

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, for MQTT deployments using usercodes/passwords: MQTT passwords are incorrectly classified as a non-authenticating identity statement (JWT) and exposed via monitoring endpoints. Versions 2.11.14 and 2.12.6 contain a fix. As a workaround, ensure monitoring end-points are adequately secured. Best practice remains to not expose the monitoring endpoint to the Internet or other untrusted network users.

Weakness (CWE): CWE-256CWE-213

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

VendorProductVersions
linuxfoundation nats-server < 2.11.15
multicluster globalhub 1.4 —
multicluster globalhub 1.5 —
multicluster globalhub 1.6 —
nats-io nats-server < 2.11.15, >= 2.12.0-RC.1, < 2.12.6
Red Hat Multicluster Global Hub 1.4.5 all versions
Red Hat Multicluster Global Hub 1.6.5 all versions
Red Hat Red Hat multicluster global hub 1.5.3 all versions
Red Hat Red Hat OpenShift Container Platform 4 —

References and patches

CPE matches (NVD) (2)
  • cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:* < 2.11.15
  • cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:* ≥ 2.12.0 < 2.12.6