BIT-NATS-2026-33219 NATS is vulnerable to pre-auth DoS through WebSockets client service

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 authentication; this requires sending a...

BIT-NATS-2026-33217 NATS allows MQTT clients to bypass ACL checks

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 ACL checks for MQTT subjects. Versions...

BIT-NATS-2026-29785 NATS Server panic via malicious compression on leafnode port

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-server by triggering a panic. This happens...

BIT-NATS-2026-27889 NATS: Pre-auth remote server crash via WebSocket frame length overflow in wsRead

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. This happens before authentication, and...

BIT-NATS-2026-33215 NATS is vulnerable to MQTT hijacking via Client ID

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. Versions 2.11.15 and 2.12.5 patch the issu...

SUSE CVE-2026-27889

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. This happens before authentication, and...

SUSE CVE-2026-29785

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-server by triggering a panic. This happens...

GO-2026-4835 NATS Server: Incomplete Stripping of Nats-Request-Info Header Allows Identity Spoofing in github.com/nats-io/nats-server

NATS Server: Incomplete Stripping of Nats-Request-Info Header Allows Identity Spoofing in github.com/nats-io/nats-server...

GO-2026-4834 NATS allows MQTT clients to bypass ACL checks in github.com/nats-io/nats-server

NATS allows MQTT clients to bypass ACL checks in github.com/nats-io/nats-server...

GO-2026-4829 NATS Server panic via malicious compression on leafnode port in github.com/nats-io/nats-server

NATS Server panic via malicious compression on leafnode port in github.com/nats-io/nats-server...

GO-2026-4836 NATS has MQTT plaintext password disclosure in github.com/nats-io/nats-server

NATS has MQTT plaintext password disclosure in github.com/nats-io/nats-server...

GO-2026-4837 NATS has pre-auth server panic via leafnode handling in github.com/nats-io/nats-server

NATS has pre-auth server panic via leafnode handling in github.com/nats-io/nats-server...

GO-2026-4833 NATS is vulnerable to MQTT hijacking via Client ID in github.com/nats-io/nats-server

NATS is vulnerable to MQTT hijacking via Client ID in github.com/nats-io/nats-server...

GO-2026-4830 NATS: Leafnode connections allow spoofing of Nats-Request-Info identity headers in github.com/nats-io/nats-server

NATS: Leafnode connections allow spoofing of Nats-Request-Info identity headers in github.com/nats-io/nats-server...

GO-2026-4831 NATS is vulnerable to pre-auth DoS through WebSockets client service in github.com/nats-io/nats-server

NATS is vulnerable to pre-auth DoS through WebSockets client service in github.com/nats-io/nats-server...

GO-2026-4826 NATS: Message tracing can be redirected to arbitrary subject in github.com/nats-io/nats-server

NATS: Message tracing can be redirected to arbitrary subject in github.com/nats-io/nats-server...

GO-2026-4827 NATS credentials are exposed in monitoring port via command-line argv in github.com/nats-io/nats-server

NATS credentials are exposed in monitoring port via command-line argv in github.com/nats-io/nats-server...

GO-2026-4828 NATS has mTLS verify_and_map authentication bypass via incorrect Subject DN matching in github.com/nats-io/nats-server

NATS has mTLS verifyandmap authentication bypass via incorrect Subject DN matching in github.com/nats-io/nats-server...

SUSE CVE-2026-33222

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, users with JetStream admin API access to restore one stream could restore to other stream names, impacting data which should have been protected against them...

SUSE CVE-2026-33223

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, the NATS message header Nats-Request-Info: is supposed to be a guarantee of identity by the NATS server, but the stripping of this header from inbound messages was...