Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-58251

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.0, 2.12.7, and 2.11.16, an authenticated user with subscription deny permissions could bypass a plain subject deny rule by using a queue subscription, because queue-specific deny evaluation could override the plain subject deny result when the queue name itself was not denied. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 38.6%
CVSS Severity
CVSS v3 Score 6.5
Products affected by CVE-2026-58251


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