CVE-2026-33216

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.

• CWE-256
• CWE-213

• https://advisories.nats.io/CVE/secnote-2026-05.txtMitigation, Vendor Advisory
• https://github.com/nats-io/nats-server/commit/b5b63cfc35a57075e09c1f57503d31721bed8099Patch
• https://github.com/nats-io/nats-server/security/advisories/GHSA-v722-jcv5-w7mcMitigation, Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:21769
• https://access.redhat.com/errata/RHSA-2026:22347
• https://access.redhat.com/errata/RHSA-2026:23345
• https://access.redhat.com/security/cve/CVE-2026-33216
• https://bugzilla.redhat.com/show_bug.cgi?id=2451448
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33216.json

Published

Mar 25, 2026

Last Modified

Aug 10, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-33210Ruby JSON is a JSON implementation for Ruby. From version 2.…9.1
• CVE-2026-33211Tekton Pipelines project provides k8s-style resources for de…9.6
• CVE-2026-33212Weblate is a web based localization tool. In versions prior …3.1
• CVE-2026-33213Redash is a package for data visualization and sharing. From…6.1
• CVE-2026-33214Weblate is a web based localization tool. In versions prior …4.3
• CVE-2026-33215NATS-Server is a High-Performance server for NATS.io, a clou…6.5
• CVE-2026-33217NATS-Server is a High-Performance server for NATS.io, a clou…6.5
• CVE-2026-33218NATS-Server is a High-Performance server for NATS.io, a clou…7.5
• CVE-2026-33219NATS-Server is a High-Performance server for NATS.io, a clou…5.3
• CVE-2026-33220Weblate is a web based localization tool. In versions prior …6.8
• CVE-2026-33221Nhost is an open source Firebase alternative with GraphQL. P…5.3
• CVE-2026-33222NATS-Server is a High-Performance server for NATS.io, a clou…4.9