SEPTEMBER 20, 2026
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Case File

CVE-2026-58254

MEDIUM · CVSS 6.5 EPSS 0.18% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-08 · Last synced 2026-08-07

CyberRota Analysis

AI-Generated

NATS Server versions prior to 2.14.3 and 2.12.8 are vulnerable due to inconsistent message trace destination checks for leafnode connections, potentially allowing unauthorized trace events to be sent and disrupting normal message delivery. This could lead to data integrity issues and operational disruptions for systems relying on NATS for messaging. Organizations using affected versions should prioritize upgrading to the patched releases to mitigate these risks.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-58254
Severity
MEDIUM
CVSS
6.5
EPSS
0.18%

Original NVD Description

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.

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