{"schema_version":1,"title":"NATS Server vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 20 vulnerabilities in NATS Server: 0 in the last 7 days and 12 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-58211, was published on 8 July 2026.","url":"https://junglewise.ai/threats/technologies/nats-server","json_url":"https://junglewise.ai/threats/technologies/nats-server.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/nats-server","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":11,"all_time":20,"critical":1,"exploited":0,"last_7_days":0,"last_30_days":0,"last_90_days":12,"last_365_days":19},"latest":[{"cve":"CVE-2026-58211","cvss":5.4,"slug":"cve-2026-58211-nats-server-authorization-bypass-in-no-auth-user-parser-path","title":"NATS Server authorization bypass in no_auth_user parser path","severity":"medium","exploited":false,"published_at":"2026-07-08T21:16:52.61+00:00","url":"https://junglewise.ai/threats/cve-2026-58211-nats-server-authorization-bypass-in-no-auth-user-parser-path"},{"cve":"CVE-2026-58208","cvss":6.8,"slug":"cve-2026-58208-nats-server-denial-of-service-via-websocket-mqtt-upgrade","title":"NATS Server denial of service via WebSocket MQTT upgrade","severity":"medium","exploited":false,"published_at":"2026-07-08T21:16:52.44+00:00","url":"https://junglewise.ai/threats/cve-2026-58208-nats-server-denial-of-service-via-websocket-mqtt-upgrade"},{"cve":"CVE-2026-58207","cvss":7.7,"slug":"cve-2026-58207-nats-server-integer-overflow-in-connz-pagination-monitoring","title":"NATS Server integer overflow in Connz pagination monitoring requests","severity":"high","exploited":false,"published_at":"2026-07-08T21:16:52.293+00:00","url":"https://junglewise.ai/threats/cve-2026-58207-nats-server-integer-overflow-in-connz-pagination-monitoring"},{"cve":"CVE-2026-58254","cvss":5.3,"slug":"cve-2026-58254-nats-server-authorization-bypass-in-leafnode-message-tracing","title":"NATS Server authorization bypass in leafnode message tracing","severity":"info","exploited":false,"published_at":"2026-07-08T20:16:55.107+00:00","url":"https://junglewise.ai/threats/cve-2026-58254-nats-server-authorization-bypass-in-leafnode-message-tracing"},{"cve":"CVE-2026-58253","cvss":8.8,"slug":"cve-2026-58253-nats-server-authentication-bypass-in-route-or-leafnode-listeners","title":"NATS Server authentication bypass in route or leafnode listeners","severity":"high","exploited":false,"published_at":"2026-07-08T20:16:54.943+00:00","url":"https://junglewise.ai/threats/cve-2026-58253-nats-server-authentication-bypass-in-route-or-leafnode-listeners"},{"cve":"CVE-2026-58252","cvss":6.5,"slug":"cve-2026-58252-nats-server-authorization-bypass-via-overlapping-wildcard","title":"NATS Server authorization bypass via overlapping wildcard subscriptions","severity":"medium","exploited":false,"published_at":"2026-07-08T20:16:54.793+00:00","url":"https://junglewise.ai/threats/cve-2026-58252-nats-server-authorization-bypass-via-overlapping-wildcard"},{"cve":"CVE-2026-58251","cvss":6.5,"slug":"cve-2026-58251-nats-server-authorization-bypass-via-queue-subscriptions","title":"NATS Server authorization bypass via queue subscriptions","severity":"medium","exploited":false,"published_at":"2026-07-08T20:16:54.63+00:00","url":"https://junglewise.ai/threats/cve-2026-58251-nats-server-authorization-bypass-via-queue-subscriptions"},{"cve":"CVE-2026-58250","cvss":7.5,"slug":"cve-2026-58250-nats-server-null-pointer-dereference-in-leafnode-handshake","title":"NATS Server NULL pointer dereference in leafnode handshake","severity":"high","exploited":false,"published_at":"2026-07-08T20:16:54.483+00:00","url":"https://junglewise.ai/threats/cve-2026-58250-nats-server-null-pointer-dereference-in-leafnode-handshake"},{"cve":"CVE-2026-58214","cvss":4.3,"slug":"cve-2026-58214-nats-server-mqtt-authorization-bypass-in-internal-subject","title":"NATS Server MQTT authorization bypass in internal subject subscription","severity":"medium","exploited":false,"published_at":"2026-07-08T20:16:54.347+00:00","url":"https://junglewise.ai/threats/cve-2026-58214-nats-server-mqtt-authorization-bypass-in-internal-subject"},{"cve":"CVE-2026-58213","cvss":7.1,"slug":"cve-2026-58213-nats-server-protocol-injection-via-mqtt-subscription-filters","title":"NATS Server protocol injection via MQTT subscription filters","severity":"high","exploited":false,"published_at":"2026-07-08T20:16:54.18+00:00","url":"https://junglewise.ai/threats/cve-2026-58213-nats-server-protocol-injection-via-mqtt-subscription-filters"},{"cve":"CVE-2026-58210","cvss":7.5,"slug":"cve-2026-58210-nats-server-denial-of-service-via-mqtt-memory-exhaustion","title":"NATS Server denial of service via MQTT memory exhaustion","severity":"high","exploited":false,"published_at":"2026-07-08T20:16:53.95+00:00","url":"https://junglewise.ai/threats/cve-2026-58210-nats-server-denial-of-service-via-mqtt-memory-exhaustion"},{"cve":"CVE-2026-58209","cvss":4.3,"slug":"cve-2026-58209-nats-server-mqtt-authorization-bypass-in-subscribe-deny-rules","title":"NATS Server MQTT authorization bypass in subscribe deny rules","severity":"medium","exploited":false,"published_at":"2026-07-08T20:16:53.8+00:00","url":"https://junglewise.ai/threats/cve-2026-58209-nats-server-mqtt-authorization-bypass-in-subscribe-deny-rules"},{"cve":"CVE-2026-33247","cvss":7.4,"epss":0.0054,"slug":"cve-2026-33247-nats-server-sensitive-information-disclosure-in-monitoring","title":"NATS-Server sensitive information disclosure in monitoring endpoint","severity":"high","exploited":false,"published_at":"2026-03-25T20:16:33.223+00:00","url":"https://junglewise.ai/threats/cve-2026-33247-nats-server-sensitive-information-disclosure-in-monitoring"},{"cve":"CVE-2026-33219","cvss":5.3,"epss":0.01,"slug":"cve-2026-33219-nats-server-denial-of-service-in-websockets-component","title":"NATS-Server denial of service in WebSockets component","severity":"medium","exploited":false,"published_at":"2026-03-25T20:16:32.777+00:00","url":"https://junglewise.ai/threats/cve-2026-33219-nats-server-denial-of-service-in-websockets-component"},{"cve":"CVE-2026-33218","cvss":7.5,"epss":0.0084,"slug":"cve-2026-33218-nats-server-denial-of-service-in-leafnode-handling","title":"NATS-Server denial of service in leafnode handling","severity":"high","exploited":false,"published_at":"2026-03-25T20:16:32.623+00:00","url":"https://junglewise.ai/threats/cve-2026-33218-nats-server-denial-of-service-in-leafnode-handling"},{"cve":"CVE-2026-33217","cvss":7.1,"epss":0.0037,"slug":"cve-2026-33217-nats-server-acl-bypass-in-mqtt-namespace","title":"NATS-Server ACL bypass in MQTT namespace","severity":"high","exploited":false,"published_at":"2026-03-25T20:16:32.473+00:00","url":"https://junglewise.ai/threats/cve-2026-33217-nats-server-acl-bypass-in-mqtt-namespace"},{"cve":"CVE-2026-33216","cvss":8.6,"epss":0.0063,"slug":"cve-2026-33216-nats-server-plaintext-password-disclosure-in-monitoring-endpoints","title":"NATS-Server plaintext password disclosure in monitoring endpoints","severity":"high","exploited":false,"published_at":"2026-03-25T20:16:32.32+00:00","url":"https://junglewise.ai/threats/cve-2026-33216-nats-server-plaintext-password-disclosure-in-monitoring-endpoints"},{"cve":"CVE-2026-29785","cvss":7.5,"epss":0.0097,"slug":"cve-2026-29785-nats-io-nats-server-null-pointer-dereference-in-leafnode-protocol","title":"nats-io nats-server NULL pointer dereference in leafnode protocol","severity":"high","exploited":false,"published_at":"2026-03-25T20:16:30.373+00:00","url":"https://junglewise.ai/threats/cve-2026-29785-nats-io-nats-server-null-pointer-dereference-in-leafnode-protocol"},{"cve":"CVE-2026-27889","cvss":7.5,"epss":0.0084,"slug":"cve-2026-27889-nats-server-denial-of-service-via-websocket-frame-length-overflow","title":"NATS Server denial of service via WebSocket frame length overflow","severity":"high","exploited":false,"published_at":"2026-03-25T20:16:27.21+00:00","url":"https://junglewise.ai/threats/cve-2026-27889-nats-server-denial-of-service-via-websocket-frame-length-overflow"},{"cve":"CVE-2025-30215","cvss":9.6,"epss":0.0059,"slug":"cve-2025-30215-nats-server-authorization-bypass-in-jetstream-admin-apis","title":"NATS Server authorization bypass in JetStream admin APIs","severity":"critical","exploited":false,"published_at":"2025-04-15T21:45:00+00:00","url":"https://junglewise.ai/threats/cve-2025-30215-nats-server-authorization-bypass-in-jetstream-admin-apis"}],"weekly":[{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":12},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-28","critical":0,"exploited":0,"vulnerabilities":0}],"related":[],"technology":{"hub":true,"name":"NATS Server","slug":"nats-server","vendor":{"name":"NATS","slug":"nats","url":"https://junglewise.ai/threats/vendors/nats"},"aliases":[],"category":"middleware","homepage":"https://nats.io/","repo_url":"https://github.com/nats-io/nats-server","description":"A distributed messaging system for cloud native applications, IoT messaging, and microservices architectures.","url":"https://junglewise.ai/threats/technologies/nats-server"},"most_severe":[{"cve":"CVE-2025-30215","cvss":9.6,"epss":0.0059,"slug":"cve-2025-30215-nats-server-authorization-bypass-in-jetstream-admin-apis","title":"NATS Server authorization bypass in JetStream admin APIs","severity":"critical","exploited":false,"published_at":"2025-04-15T21:45:00+00:00","url":"https://junglewise.ai/threats/cve-2025-30215-nats-server-authorization-bypass-in-jetstream-admin-apis"},{"cve":"CVE-2026-58253","cvss":8.8,"slug":"cve-2026-58253-nats-server-authentication-bypass-in-route-or-leafnode-listeners","title":"NATS Server authentication bypass in route or leafnode listeners","severity":"high","exploited":false,"published_at":"2026-07-08T20:16:54.943+00:00","url":"https://junglewise.ai/threats/cve-2026-58253-nats-server-authentication-bypass-in-route-or-leafnode-listeners"},{"cve":"CVE-2026-33216","cvss":8.6,"epss":0.0063,"slug":"cve-2026-33216-nats-server-plaintext-password-disclosure-in-monitoring-endpoints","title":"NATS-Server plaintext password disclosure in monitoring endpoints","severity":"high","exploited":false,"published_at":"2026-03-25T20:16:32.32+00:00","url":"https://junglewise.ai/threats/cve-2026-33216-nats-server-plaintext-password-disclosure-in-monitoring-endpoints"},{"cve":"CVE-2026-58207","cvss":7.7,"slug":"cve-2026-58207-nats-server-integer-overflow-in-connz-pagination-monitoring","title":"NATS Server integer overflow in Connz pagination monitoring requests","severity":"high","exploited":false,"published_at":"2026-07-08T21:16:52.293+00:00","url":"https://junglewise.ai/threats/cve-2026-58207-nats-server-integer-overflow-in-connz-pagination-monitoring"},{"cve":"CVE-2026-29785","cvss":7.5,"epss":0.0097,"slug":"cve-2026-29785-nats-io-nats-server-null-pointer-dereference-in-leafnode-protocol","title":"nats-io nats-server NULL pointer dereference in leafnode protocol","severity":"high","exploited":false,"published_at":"2026-03-25T20:16:30.373+00:00","url":"https://junglewise.ai/threats/cve-2026-29785-nats-io-nats-server-null-pointer-dereference-in-leafnode-protocol"},{"cve":"CVE-2026-33218","cvss":7.5,"epss":0.0084,"slug":"cve-2026-33218-nats-server-denial-of-service-in-leafnode-handling","title":"NATS-Server denial of service in leafnode handling","severity":"high","exploited":false,"published_at":"2026-03-25T20:16:32.623+00:00","url":"https://junglewise.ai/threats/cve-2026-33218-nats-server-denial-of-service-in-leafnode-handling"},{"cve":"CVE-2026-27889","cvss":7.5,"epss":0.0084,"slug":"cve-2026-27889-nats-server-denial-of-service-via-websocket-frame-length-overflow","title":"NATS Server denial of service via WebSocket frame length overflow","severity":"high","exploited":false,"published_at":"2026-03-25T20:16:27.21+00:00","url":"https://junglewise.ai/threats/cve-2026-27889-nats-server-denial-of-service-via-websocket-frame-length-overflow"},{"cve":"CVE-2026-58250","cvss":7.5,"slug":"cve-2026-58250-nats-server-null-pointer-dereference-in-leafnode-handshake","title":"NATS Server NULL pointer dereference in leafnode handshake","severity":"high","exploited":false,"published_at":"2026-07-08T20:16:54.483+00:00","url":"https://junglewise.ai/threats/cve-2026-58250-nats-server-null-pointer-dereference-in-leafnode-handshake"},{"cve":"CVE-2026-58210","cvss":7.5,"slug":"cve-2026-58210-nats-server-denial-of-service-via-mqtt-memory-exhaustion","title":"NATS Server denial of service via MQTT memory exhaustion","severity":"high","exploited":false,"published_at":"2026-07-08T20:16:53.95+00:00","url":"https://junglewise.ai/threats/cve-2026-58210-nats-server-denial-of-service-via-mqtt-memory-exhaustion"},{"cve":"CVE-2026-33247","cvss":7.4,"epss":0.0054,"slug":"cve-2026-33247-nats-server-sensitive-information-disclosure-in-monitoring","title":"NATS-Server sensitive information disclosure in monitoring endpoint","severity":"high","exploited":false,"published_at":"2026-03-25T20:16:33.223+00:00","url":"https://junglewise.ai/threats/cve-2026-33247-nats-server-sensitive-information-disclosure-in-monitoring"}],"generated_at":"2026-09-28T03:07:00.154823+00:00"}