cvedb.io
CVE-2026-33249
MEDIUM · CVSS 4.3
EPSS exploitation probability: 0%
Published 2026-03-25T21:16:47.737 · Last modified 2026-06-17T10:37:11.480

Summary

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.

Affected products

linuxfoundation — nats-server

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.