nats-server vulnerabilities
CVEs whose affected-version data names the nats-server package (go). Each record lists the affected and patched versions; check a specific version with the dependency checker or POST /api/sbom.
16 CVEsRSS
CVE-2026-58254Medium· 6.5NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.8, message trace destination checks were applied to ordinary client connections but not consistently to messages a…
CVE-2026-58253High· 8.8NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system
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 a…
CVE-2026-58252Medium· 6.5NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system
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 overlapp…
CVE-2026-58251Medium· 6.5NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system
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 us…
CVE-2026-58250High· 7.5NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.12.8 and 2.11.17, an unauthenticated peer with network access to a leafnode listener with compression enabled could crash the se…
CVE-2026-58214Medium· 4.3NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, an authenticated MQTT client could subscribe to the internal $MQTT.deliver.pubrel subject family, bypassing co…
CVE-2026-58213High· 7.1NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.1 and 2.12.9, an MQTT client could include protocol control characters in subscription filters that were later forwarded as N…
CVE-2026-58210High· 7.5NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, an unauthenticated MQTT client could cause the server to retain large incomplete MQTT CONNECT packets before a…
CVE-2026-58209Medium· 4.3NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a…
CVE-2026-33247High· 7.4NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system
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), t…
CVE-2026-33219Medium· 5.3⚖ disputedNATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system
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-…
CVE-2026-33218High· 7.5NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system
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 mess…
CVE-2026-33217High· 7.1NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system
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 M…
CVE-2026-33216High· 8.6NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system
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-auth…
CVE-2026-29785High· 7.5NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system
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 …
CVE-2026-27889High· 7.5PoCNATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system
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…