CVE-2026-58252

MEDIUM

NATS Server: Subscribe Authz Bypass via Wildcard-Overlap

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 could receive messages on denied subjects when a wildcard subscription overlapped with a configured wildcard deny rule but was not a subset of it, and queue subscriptions could also affect delivery to legitimate queue consumers. 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 0.0046
EPSS Percentile 37.2%
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-preview.1, < 2.12.7
Published Jul 08, 2026
Tracked Since Jul 09, 2026