CVE Watch13 jul 2026

CVE-2026-58253

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, when

CVSS

8.8

Alto

EPSS

0.4%

p29

KEV

—

Exploit Today

0-100

Publicado: 8 jul 2026 · Última mod.: 13 jul 2026 · CWE-287

EPSS · 30d

0.4%EPSS · 30 días0.4%

2026-07-092026-07-21

Descripción técnica

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, when no_auth_user was configured, a parser fast path intended for ordinary client connections could also apply to route or leafnode listeners, allowing an unauthenticated peer to bypass inter-server CONNECT authentication and operate with the privileges associated with that connection type. This issue is fixed in versions 2.14.0, 2.12.7, and 2.11.16.

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