CVE-2026-58254NATS Server: Incomplete fix for CVE-2026-33249: Leaf node connections bypass Nats-Trace-Dest permission check

Descripción

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.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• https://github.com/nats-io/nats-server/security/advisories/GHSA-p3j5-5hrq-p75h Vendor Advisory
• https://github.com/nats-io/nats-server/commit/cbe845932980b71563efac5cfa4cc751c88936cd Patch
• https://github.com/nats-io/nats-server/releases/tag/v2.12.8 Release Notes
• https://github.com/nats-io/nats-server/releases/tag/v2.14.3 Release Notes