nats-server: NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system
CVE-2026-33223 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-33223, released March 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| govulncheck-vulndb · opensuse-leap 15.6 | 0.0.20260326T203309-150000.1.155.2 | SUSE-SU-2026:1135-1 | Mar 27, 2026 |
| govulncheck-vulndb · opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | OPENSUSE-SU-2026:21483-1 | Jul 30, 2026 |
| nats-server · Debian 14 | 2.12.6-1 | DEBIAN-CVE-2026-33223 | Mar 25, 2026 |
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