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CVE-2026-58254

5.3 medium SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 2

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 5.3 · linuxfoundationNVD modified 2026-10-25 17:10

Affected (CPE criteria) 1

  • cpe:2.3:a:linuxfoundation:nats-server:*:*:*:*:*:*:*:*

References 4