github.com/nats-io/nats-server vulnerabilities

Browse known CVEs and advisories by package and ecosystem. Severity tells you the worst case. What determines real risk is whether the vulnerable code actually runs in your applications.

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CVE-IDSeverityPackage summary
CVE-2026-27889Highgithub.com/nats-io/nats-server/v2: NATS: Pre-auth remote server crash via WebSocket frame length overflow in wsReadCVE-2026-33248Mediumgithub.com/nats-io/nats-server/v2: NATS has mTLS verify_and_map authentication bypass via incorrect Subject DN matchingCVE-2026-33246Mediumgithub.com/nats-io/nats-server/v2: NATS: Leafnode connections allow spoofing of Nats-Request-Info identity headersCVE-2026-33223Mediumgithub.com/nats-io/nats-server/v2: NATS Server: Incomplete Stripping of Nats-Request-Info Header Allows Identity SpoofingCVE-2026-33222Mediumgithub.com/nats-io/nats-server/v2: NATS JetStream has an authorization bypass through its Management APICVE-2026-33219Mediumgithub.com/nats-io/nats-server/v2: NATS is vulnerable to pre-auth DoS through WebSockets client serviceCVE-2026-33218Highgithub.com/nats-io/nats-server/v2: NATS has pre-auth server panic via leafnode handlingCVE-2026-33217Highgithub.com/nats-io/nats-server/v2: NATS allows MQTT clients to bypass ACL checksCVE-2026-33216Highgithub.com/nats-io/nats-server/v2: NATS has MQTT plaintext password disclosureCVE-2026-29785Highgithub.com/nats-io/nats-server/v2: NATS Server panic via malicious compression on leafnode portCVE-2026-27571Mediumgithub.com/nats-io/nats-server/v2: nats-server websockets are vulnerable to pre-auth memory DoSCVE-2022-28357Criticalgithub.com/nats-io/nats-server: NATS nats-server allows directory traversal via unintended path to a management action CVE-2020-28466Highgithub.com/nats-io/nats-server: Denial of service in github.com/nats-io/nats-server/server

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