Security Advisory

CVE-2026-58250

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-08 19:48:55

Last updated 2026-07-09 13:33:45

Assigner GitHub_M

CVSS score 7.5

State PUBLISHED

Description

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.12.8 and 2.11.17, an unauthenticated peer with network access to a leafnode listener with compression enabled could crash the server during the pre-authentication leafnode handshake by sending repeated leafnode INFO protocol messages before authentication and account setup completed. This issue is fixed in versions 2.12.8 and 2.11.17.

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