CVE-2026-58251

MEDIUM

NATS Server: Queue Subscribe Authz Bypass

Title source: cna
STIX 2.1

Description

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.

References (7)

Core 7
Core References

Scores

CVSS v3 6.5
EPSS 0.0049
EPSS Percentile 38.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-285
Status published
Products (3)
linuxfoundation/nats-server < 2.11.16
nats-io/nats-server < 2.11.16
nats-io/nats-server >= 2.12.0-RC.1, < 2.12.7
Published Jul 08, 2026
Tracked Since Jul 09, 2026