nats-server: NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system
CVE-2026-33249 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-33249, 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. Starting in version 2.11.0 and prior to versions 2.11.15 and 2.12.6, a valid client which uses message tracing headers can indicate that the trace messages can be sent to an arbitrary valid subject, including those to which the client does not have publish permission. The payload is a valid trace message and not chosen by the attacker. 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-2026-33249 | Mar 25, 2026 |
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