Go modules package
github.com/nats-io/nats-server/v2
pkg:golang/github.com/nats-io/nats-server/v2
Vulnerabilities (23)
| CVE | Sev | CVSS | KEV | Affected versions | Fixed in | Published | Description |
|---|---|---|---|---|---|---|---|
| CVE-2026-33249 | — | >= 2.11.0, < 2.11.15 | 2.11.15 | Mar 25, 2026 | 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 sent to an arbitrary | ||
| CVE-2026-33223 | — | < 2.11.15 | 2.11.15 | Mar 25, 2026 | 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 i | ||
| CVE-2026-33248 | — | < 2.11.15 | 2.11.15 | Mar 25, 2026 | 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 mTLS for client identity, with `verify_and_map` to derive a NATS identity from the client certificate's Subject DN, certain patterns of | ||
| CVE-2026-33222 | — | < 2.11.15 | 2.11.15 | Mar 25, 2026 | 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 a | ||
| CVE-2026-33247 | — | < 2.11.15 | 2.11.15 | Mar 25, 2026 | 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 are visible to any us | ||
| CVE-2026-33219 | — | < 2.11.15 | 2.11.15 | Mar 25, 2026 | 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 | ||
| CVE-2026-33218 | — | < 2.11.15 | 2.11.15 | Mar 25, 2026 | 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. Versions 2.11.15 an | ||
| CVE-2026-33246 | — | < 2.11.15 | 2.11.15 | Mar 25, 2026 | NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. The nats-server offers a `Nats-Request-Info:` message header, providing information about a request. This is supposed to provide enough information to allow for account/user identifica | ||
| CVE-2026-33217 | — | < 2.11.15 | 2.11.15 | Mar 25, 2026 | 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 s | ||
| CVE-2026-33216 | — | < 2.11.15 | 2.11.15 | Mar 25, 2026 | 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 exp | ||
| CVE-2026-29785 | — | < 2.11.14 | 2.11.14 | Mar 25, 2026 | 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 p | ||
| CVE-2026-27889 | — | >= 2.2.0, < 2.11.14 | 2.11.14 | Mar 25, 2026 | 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 a | ||
| CVE-2026-33215 | — | < 2.11.15 | 2.11.15 | Mar 24, 2026 | 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 | ||
| CVE-2026-27571 | — | < 2.11.12 | 2.11.12 | Feb 24, 2026 | NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. The WebSockets handling of NATS messages handles compressed messages via the WebSockets negotiated compression. Prior to versions 2.11.2 and 2.12.3, the implementation bound the memory | ||
| CVE-2025-30215 | Cri | 9.6 | >= 2.11.0-RC.1, < 2.11.1 | 2.11.1 | Apr 16, 2025 | NATS-Server is a High-Performance server for NATS.io, the cloud and edge native messaging system. In versions starting from 2.2.0 but prior to 2.10.27 and 2.11.1, the management of JetStream assets happens with messages in the $JS. subject namespace in the system account; this is | |
| CVE-2022-29946 | Med | 6.3 | < 2.8.2 | 2.8.2 | Jul 11, 2024 | NATS.io NATS Server before 2.8.2 and Streaming Server before 0.24.6 could allow a remote attacker to bypass security restrictions, caused by the failure to enforce negative user permissions in one scenario. By using a queue subscription on the wildcard, an attacker could exploit | |
| CVE-2021-32026 | low | — | < 2.2.3 | 2.2.3 | May 14, 2024 | (This advisory is canonically <https://advisories.nats.io/CVE/CVE-2021-32026.txt>) ### Problem Description The NATS server by default uses a restricted set of modern ciphersuites for TLS. This selection can be overridden through configuration. The defaults include just RSA and | |
| CVE-2023-46129 | — | >= 2.10.0, < 2.10.4 | 2.10.4 | Oct 30, 2023 | NATS.io is a high performance open source pub-sub distributed communication technology, built for the cloud, on-premise, IoT, and edge computing. The cryptographic key handling library, nkeys, recently gained support for encryption, not just for signing/authentication. This is us | ||
| CVE-2023-47090 | — | >= 2.2.0, < 2.9.23 | 2.9.23 | Oct 30, 2023 | NATS nats-server before 2.9.23 and 2.10.x before 2.10.2 has an authentication bypass. An implicit $G user in an authorization block can sometimes be used for unauthenticated access, even when the intention of the configuration was for each user to have an account. The earliest af | ||
| CVE-2022-26652 | — | >= 2.2.0, < 2.7.4 | 2.7.4 | Mar 10, 2022 | NATS nats-server before 2.7.4 allows Directory Traversal (with write access) via an element in a ZIP archive for JetStream streams. nats-streaming-server before 0.24.3 is also affected. |
- CVE-2026-33249Mar 25, 2026affected >= 2.11.0, < 2.11.15fixed 2.11.15
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 sent to an arbitrary
- CVE-2026-33223Mar 25, 2026affected < 2.11.15fixed 2.11.15
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 i
- CVE-2026-33248Mar 25, 2026affected < 2.11.15fixed 2.11.15
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 mTLS for client identity, with `verify_and_map` to derive a NATS identity from the client certificate's Subject DN, certain patterns of
- CVE-2026-33222Mar 25, 2026affected < 2.11.15fixed 2.11.15
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 a
- CVE-2026-33247Mar 25, 2026affected < 2.11.15fixed 2.11.15
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 are visible to any us
- CVE-2026-33219Mar 25, 2026affected < 2.11.15fixed 2.11.15
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
- CVE-2026-33218Mar 25, 2026affected < 2.11.15fixed 2.11.15
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. Versions 2.11.15 an
- CVE-2026-33246Mar 25, 2026affected < 2.11.15fixed 2.11.15
NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. The nats-server offers a `Nats-Request-Info:` message header, providing information about a request. This is supposed to provide enough information to allow for account/user identifica
- CVE-2026-33217Mar 25, 2026affected < 2.11.15fixed 2.11.15
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 s
- CVE-2026-33216Mar 25, 2026affected < 2.11.15fixed 2.11.15
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 exp
- CVE-2026-29785Mar 25, 2026affected < 2.11.14fixed 2.11.14
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 p
- CVE-2026-27889Mar 25, 2026affected >= 2.2.0, < 2.11.14fixed 2.11.14
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 a
- CVE-2026-33215Mar 24, 2026affected < 2.11.15fixed 2.11.15
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
- CVE-2026-27571Feb 24, 2026affected < 2.11.12fixed 2.11.12
NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. The WebSockets handling of NATS messages handles compressed messages via the WebSockets negotiated compression. Prior to versions 2.11.2 and 2.12.3, the implementation bound the memory
- affected >= 2.11.0-RC.1, < 2.11.1fixed 2.11.1
NATS-Server is a High-Performance server for NATS.io, the cloud and edge native messaging system. In versions starting from 2.2.0 but prior to 2.10.27 and 2.11.1, the management of JetStream assets happens with messages in the $JS. subject namespace in the system account; this is
- affected < 2.8.2fixed 2.8.2
NATS.io NATS Server before 2.8.2 and Streaming Server before 0.24.6 could allow a remote attacker to bypass security restrictions, caused by the failure to enforce negative user permissions in one scenario. By using a queue subscription on the wildcard, an attacker could exploit
- affected < 2.2.3fixed 2.2.3
(This advisory is canonically <https://advisories.nats.io/CVE/CVE-2021-32026.txt>) ### Problem Description The NATS server by default uses a restricted set of modern ciphersuites for TLS. This selection can be overridden through configuration. The defaults include just RSA and
- CVE-2023-46129Oct 30, 2023affected >= 2.10.0, < 2.10.4fixed 2.10.4
NATS.io is a high performance open source pub-sub distributed communication technology, built for the cloud, on-premise, IoT, and edge computing. The cryptographic key handling library, nkeys, recently gained support for encryption, not just for signing/authentication. This is us
- CVE-2023-47090Oct 30, 2023affected >= 2.2.0, < 2.9.23fixed 2.9.23
NATS nats-server before 2.9.23 and 2.10.x before 2.10.2 has an authentication bypass. An implicit $G user in an authorization block can sometimes be used for unauthenticated access, even when the intention of the configuration was for each user to have an account. The earliest af
- CVE-2022-26652Mar 10, 2022affected >= 2.2.0, < 2.7.4fixed 2.7.4
NATS nats-server before 2.7.4 allows Directory Traversal (with write access) via an element in a ZIP archive for JetStream streams. nats-streaming-server before 0.24.3 is also affected.
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