# nats-io nats-server.

Every CVE that names nats-io nats-server among its affected products, newest first. Vendors and products are as the CNA wrote them.

## Records, newest first

- [NATS Server: MQTT-over-WebSocket Path Can Crash WebSocket-Only JetStream Servers Before MQTT Is Enabled](https://agentprime.io/advisories/CVE-2026-58208.md)
  `CVE-2026-58208` · CVE record: nats-io nats-server · CVSS 6.8 Medium · Not analysed yet · Published 8 Jul 2026 · Tags: CWE-248
- [NATS Server: \`no_auth_user\` pre-CONNECT fast path bypasses user connection restrictions](https://agentprime.io/advisories/CVE-2026-58211.md)
  `CVE-2026-58211` · CVE record: nats-io nats-server · CVSS 5.4 Medium · Not analysed yet · Published 8 Jul 2026 · Tags: Broken access control
- [NATS Server: Remote crash via integer overflow in Connz pagination](https://agentprime.io/advisories/CVE-2026-58207.md)
  `CVE-2026-58207` · CVE record: nats-io nats-server · CVSS 7.7 High · Not analysed yet · Published 8 Jul 2026 · Tags: Memory corruption
- [NATS Server: MQTT partial CONNECT packets can exhaust pre-auth memory](https://agentprime.io/advisories/CVE-2026-58210.md)
  `CVE-2026-58210` · CVE record: nats-io nats-server · CVSS 7.5 High · Not analysed yet · Published 8 Jul 2026 · Tags: Denial of service
- [NATS Server: MQTT retained and QoS replay bypass subscribe deny filters](https://agentprime.io/advisories/CVE-2026-58209.md)
  `CVE-2026-58209` · CVE record: nats-io nats-server · CVSS 4.3 Medium · Not analysed yet · Published 8 Jul 2026 · Tags: Broken access control
- [NATS Server: MQTT subscribe ACL bypass via $MQTT.deliver.pubrel prefix (incomplete fix for CVE-2026-33217)](https://agentprime.io/advisories/CVE-2026-58214.md)
  `CVE-2026-58214` · CVE record: nats-io nats-server · CVSS 4.3 Medium · Not analysed yet · Published 8 Jul 2026 · Tags: Broken access control
- [NATS Server: Incomplete fix for CVE-2026-33249: Leaf node connections bypass Nats-Trace-Dest permission check](https://agentprime.io/advisories/CVE-2026-58254.md)
  `CVE-2026-58254` · CVE record: nats-io nats-server · CVSS 5.3 Medium · Not analysed yet · Published 8 Jul 2026 · Tags: Broken access control
- [NATS Server: MQTT SUBSCRIBE Protocol Injection via Leaf Node/Route Forwarding allows arbitrary NATS command injection](https://agentprime.io/advisories/CVE-2026-58213.md)
  `CVE-2026-58213` · CVE record: nats-io nats-server · CVSS 7.1 High · Not analysed yet · Published 8 Jul 2026 · Tags: Other injection
- [NATS Server: Pre-auth server crash via double INFO in leafnode handshake](https://agentprime.io/advisories/CVE-2026-58250.md)
  `CVE-2026-58250` · CVE record: nats-io nats-server · CVSS 7.5 High · Not analysed yet · Published 8 Jul 2026 · Tags: Memory corruption
- [NATS Server: Subscribe Authz Bypass via Wildcard-Overlap](https://agentprime.io/advisories/CVE-2026-58252.md)
  `CVE-2026-58252` · CVE record: nats-io nats-server · CVSS 6.5 Medium · Not analysed yet · Published 8 Jul 2026 · Tags: Broken access control
- [NATS Server: Route API Auth Bypass](https://agentprime.io/advisories/CVE-2026-58253.md)
  `CVE-2026-58253` · CVE record: nats-io nats-server · CVSS 8.8 High · Not analysed yet · Published 8 Jul 2026 · Tags: Authentication bypass
- [NATS Server: Queue Subscribe Authz Bypass](https://agentprime.io/advisories/CVE-2026-58251.md)
  `CVE-2026-58251` · CVE record: nats-io nats-server · CVSS 6.5 Medium · Not analysed yet · Published 8 Jul 2026 · Tags: Broken access control

## Filters and formats

Filters are query parameters on this URL: `q` (words, as in a web search engine: `"a phrase"`, `OR`, `-word`; an id; a package or product name), `severity` (low, medium, high or critical), `critical=1`, `kev=1`, `ecosystem` (npm, pypi, packagist, go, maven, rubygems, crates, nuget, hex), `kind=package`, `assigner` (a CNA’s short name), `min_score` and `state`. Each record’s title links to its Markdown page.

- The same list as JSON: <https://api.agentprime.io/v1/advisories?technology=nats-io-nats-server>
- Every list: <https://agentprime.io/advisories.md>, critical: <https://agentprime.io/advisories/critical.md>; by weakness: <https://agentprime.io/advisories/tag/sql-injection.md> and the other tags in <https://agentprime.io/llms.txt>; by technology: `/advisories/technology/<slug>.md` (`fortinet-fortimail`)

---

The web page: <https://agentprime.io/advisories/technology/nats-io-nats-server/>. Everything for agents: <https://agentprime.io/llms.txt>.