Technology · NATS
NATS Server vulnerabilities
Updated . Rebuilt every hour.
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.
- Last 7 days
- 0
- Last 90 days
- 12
- Critical, all time
- 1
- Exploited in the wild
- 0
About NATS Server
A distributed messaging system for cloud native applications, IoT messaging, and microservices architectures.
Latest NATS Server vulnerabilities
- CVE-2026-58211: NATS Server authorization bypass in no_auth_user parser pathmediumCVSS 5.4
- CVE-2026-58208: NATS Server denial of service via WebSocket MQTT upgrademediumCVSS 6.8
- CVE-2026-58207: NATS Server integer overflow in Connz pagination monitoring requestshighCVSS 7.7
- CVE-2026-58254: NATS Server authorization bypass in leafnode message tracinginfoCVSS 5.3
- CVE-2026-58253: NATS Server authentication bypass in route or leafnode listenershighCVSS 8.8
- CVE-2026-58252: NATS Server authorization bypass via overlapping wildcard subscriptionsmediumCVSS 6.5
- CVE-2026-58251: NATS Server authorization bypass via queue subscriptionsmediumCVSS 6.5
- CVE-2026-58250: NATS Server NULL pointer dereference in leafnode handshakehighCVSS 7.5
- CVE-2026-58214: NATS Server MQTT authorization bypass in internal subject subscriptionmediumCVSS 4.3
- CVE-2026-58213: NATS Server protocol injection via MQTT subscription filtershighCVSS 7.1
- CVE-2026-58210: NATS Server denial of service via MQTT memory exhaustionhighCVSS 7.5
- CVE-2026-58209: NATS Server MQTT authorization bypass in subscribe deny rulesmediumCVSS 4.3
- CVE-2026-33247: NATS-Server sensitive information disclosure in monitoring endpointhighCVSS 7.4EPSS 0.5%
- CVE-2026-33219: NATS-Server denial of service in WebSockets componentmediumCVSS 5.3EPSS 1.0%
- CVE-2026-33218: NATS-Server denial of service in leafnode handlinghighCVSS 7.5EPSS 0.8%
- CVE-2026-33217: NATS-Server ACL bypass in MQTT namespacehighCVSS 7.1EPSS 0.4%
- CVE-2026-33216: NATS-Server plaintext password disclosure in monitoring endpointshighCVSS 8.6EPSS 0.6%
- CVE-2026-29785: nats-io nats-server NULL pointer dereference in leafnode protocolhighCVSS 7.5EPSS 1.0%
- CVE-2026-27889: NATS Server denial of service via WebSocket frame length overflowhighCVSS 7.5EPSS 0.8%
- CVE-2025-30215: NATS Server authorization bypass in JetStream admin APIscriticalCVSS 9.6EPSS 0.6%
Most severe NATS Server vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2025-30215: NATS Server authorization bypass in JetStream admin APIscriticalCVSS 9.6EPSS 0.6%
- CVE-2026-58253: NATS Server authentication bypass in route or leafnode listenershighCVSS 8.8
- CVE-2026-33216: NATS-Server plaintext password disclosure in monitoring endpointshighCVSS 8.6EPSS 0.6%
- CVE-2026-58207: NATS Server integer overflow in Connz pagination monitoring requestshighCVSS 7.7
- CVE-2026-29785: nats-io nats-server NULL pointer dereference in leafnode protocolhighCVSS 7.5EPSS 1.0%
- CVE-2026-33218: NATS-Server denial of service in leafnode handlinghighCVSS 7.5EPSS 0.8%
- CVE-2026-27889: NATS Server denial of service via WebSocket frame length overflowhighCVSS 7.5EPSS 0.8%
- CVE-2026-58250: NATS Server NULL pointer dereference in leafnode handshakehighCVSS 7.5
- CVE-2026-58210: NATS Server denial of service via MQTT memory exhaustionhighCVSS 7.5
- CVE-2026-33247: NATS-Server sensitive information disclosure in monitoring endpointhighCVSS 7.4EPSS 0.5%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 12 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/nats-server.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "NATS Server vulnerabilities", https://junglewise.ai/threats/technologies/nats-server, 26 September 2026.