6.4
Medium
CVE-2026-33223 NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system
Description
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, the NATS message header `Nats-Request-Info:` is supposed to be a guarantee of identity by the NATS server, but the stripping of this header from inbound messages was not fully effective. An attacker with valid credentials for any regular client interface could thus spoof their identity to services which rely upon this header. Versions 2.11.15 and 2.12.6 contain a fix. No known workarounds are available.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| nats-server 2.12 | 2.12.0-RC.1 → < 2.12.6 | 2.12.6 |
| nats-server 2.11 | earliest → < 2.11.15 | 2.11.15 |
References
- github.com github.com
- advisories.nats.io advisories.nats.io
Timeline
- Published
- Last modified
Other CVEs of nats-server
The 27 CVEs of nats-server →
CVE-2026-58208
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system
6.8
Medium
CVE-2026-58211
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system
5.4
Medium
CVE-2026-58207
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system
7.7
High
CVE-2026-58210
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system
7.5
High