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 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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b	Patch
https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854	Patch
https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6	Patch
https://github.com/nats-io/nats-server/releases/tag/v2.11.16	Release Notes
https://github.com/nats-io/nats-server/releases/tag/v2.12.7	Release Notes
https://github.com/nats-io/nats-server/releases/tag/v2.14.0	Release Notes
https://github.com/nats-io/nats-server/security/advisories/GHSA-wh7g-5m82-pmhr	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:linuxfoundation:nats-server::::::::
	cpe:2.3:a:linuxfoundation:nats-server::::::::

History

25 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) NATS Server es un servidor de alto rendimiento para NATS.io, el sistema de mensajería nativo de la nube y del borde. Antes de las versiones 2.14.0, 2.12.7 y 2.11.16, un usuario autenticado podía recibir mensajes en temas denegados cuando una suscripción con comodín se superponía con una regla de denegación de comodín configurada pero no era un subconjunto de ella, y las suscripciones de cola también podían afectar la entrega a consumidores de cola legítimos. Este problema está solucionado en las versiones 2.14.0, 2.12.7 y 2.11.16.

Information

Published : 2026-07-08 20:16

Updated : 2026-10-25 17:10

NVD link : CVE-2026-58252

Mitre link : CVE-2026-58252

CVE.ORG link : CVE-2026-58252

JSON object : View

Products Affected

linuxfoundation

nats-server

CWE

CWE-285

Improper Authorization

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