CVE-2026-58254

Details

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.8, message trace destination checks were applied to ordinary client connections but not consistently to messages arriving through leafnode connections, allowing a leafnode operator to send trace events to subjects that would not otherwise be permitted and to use trace-only behavior to prevent normal delivery or storage of affected messages. This issue is fixed in versions 2.14.3 and 2.12.8.

Affected Packages

NATS Server for Paessler PRTG

Windows 10 (1507)Windows 10 (1607) / Server 2016Windows 10 (1703)Windows 10 (1709)Windows 10 (1803)

Fixed in:

2.12.82.14.3

References

WEB

https://github.com/nats-io/nats-server/commit/cbe845932980b71563efac5cfa4cc751c88936cd

WEB

https://github.com/nats-io/nats-server/releases/tag/v2.12.8

WEB

https://github.com/nats-io/nats-server/releases/tag/v2.14.3

WEB

https://github.com/nats-io/nats-server/security/advisories/GHSA-p3j5-5hrq-p75h

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-58254