linuxfoundation nats-server Schwachstellen (CVE)

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26 Ergebnisse
6.5Mittel
CVE-2026-58252

NATS Server: Subscribe Authz Bypass via Wildcard-Overlap

nats-io nats-server

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, an authenticated user could receive messages on denied subjects when a wildcard subscription overlapped with a configured w…

8.8Hoch
CVE-2026-58253

NATS Server: Route API Auth Bypass

nats-io nats-server

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 …

6.5Mittel
CVE-2026-58251

NATS Server: Queue Subscribe Authz Bypass

nats-io nats-server

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, an authenticated user with subscription deny permissions could bypass a plain subject deny rule by using a queue subscripti…

4.3Mittel
CVE-2026-33249

NATS: Message tracing can be redirected to arbitrary subject

nats-io nats-server

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Starting in version 2.11.0 and prior to versions 2.11.15 and 2.12.6, a valid client which uses message tracing headers can indicate that the trace messages can be …

7.4Hoch
CVE-2026-33247

NATS credentials are exposed in monitoring port via command-line argv

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

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, if a nats-server is run with static credentials for all clients provided via argv (the command-line), then those credentials …

5.3Mittel
CVE-2026-33219

NATS is vulnerable to pre-auth DoS through WebSockets client service

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

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, a malicious client which can connect to the WebSockets port can cause unbounded memory use in the nats-server before authenti…

7.5Hoch
CVE-2026-33218

NATS has pre-auth server panic via leafnode handling

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

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, a client which can connect to the leafnode port can crash the nats-server with a certain malformed message pre-authentication…

7.1Hoch
CVE-2026-33217

NATS allows MQTT clients to bypass ACL checks

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

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, when using ACLs on message subjects, these ACLs were not applied in the `$MQTT.>` namespace, allowing MQTT clients to bypass …

8.6Hoch
CVE-2026-33216

NATS 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

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 st…

7.5Hoch
CVE-2026-29785

NATS Server panic via malicious compression on leafnode port

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

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.14 and 2.12.5, if the nats-server has the "leafnode" configuration enabled (not default), then anyone who can connect can crash the nats-ser…

7.5Hoch
CVE-2026-27889

NATS: Pre-auth remote server crash via WebSocket frame length overflow in wsRead

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

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Starting in version 2.2.0 and prior to versions 2.11.14 and 2.12.5, a missing sanity check on a WebSockets frame could trigger a server panic in the nats-server. …

6.5Mittel
CVE-2026-33215

NATS is vulnerable to MQTT hijacking via Client ID

nats-io nats-server

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. The nats-server provides an MQTT client interface. Prior to versions 2.11.15 and 2.12.5, Sessions and Messages can by hijacked via MQTT Client ID malfeasance. Vers…