CVE-2026-58252: 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…

PriorityP340medium6.5CVSS 3.1

AVNACLPRLUINSUCHINAN

EPSS

0.46%

38.6th percentile

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.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
linuxfoundation	nats-server	< 2.11.16	2.11.16
linuxfoundation	nats-server	>= 2.12.0 < 2.12.7	2.12.7
nats-io	nats-server	< 2.11.16	2.11.16
nats-io	nats-server	—	—

CVSS provenance

nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

vendor_redhat6.5MEDIUM

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