CVE-2026-58254 (GCVE-0-2026-58254)
Vulnerability from cvelistv5
Published
2026-07-08 19:56
Modified
2026-07-09 13:38
Severity ?
5.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CWE
  • CWE-863 - Incorrect Authorization
Summary
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.
References
Impacted products
Vendor Product Version
nats-io nats-server Version: < 2.12.8
Version: >= 2.14.0-RC.1, < 2.14.3
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