Description

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.

INFO

Published Date :

2026-03-25T20:21:30.156Z

Last Modified :

2026-03-26T19:52:12.206Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-33249 vulnerability.

Vendors Products
Linuxfoundation
  • Nats-server
Nats
  • Nats Server
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-33249.

URL Resource
https://advisories.nats.io/CVE/secnote-2026-15.txt cve-icon cve-icon cve-icon
https://github.com/nats-io/nats-server/security/advisories/GHSA-8m2x-3m6q-6w8j cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-33249 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-33249 cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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Privileges Required
User Interaction
Scope
Confidentiality Impact
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Availability Impact