---
id: CVE-2026-58251
title: >-
  NATS Server is a high-performance server for NATS.io, the cloud and edge
  native messaging system
summary: >-
  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 us…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-285
vendor: linuxfoundation
product: nats-server
affected:
  - nats-server < 2.11.16
  - 'nats-server >= 2.12.0, < 2.12.7'
patched:
  - nats-server 2.12.7
published: '2026-07-08'
updated: '2026-07-13'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-58251'
references:
  - url: >-
      https://github.com/nats-io/nats-server/commit/013586288078def45a6788096924eb4d150db65c
    label: security-advisories@github.com
  - url: >-
      https://github.com/nats-io/nats-server/commit/79c2f6e9ff87f594596337b6427dda85c38d1fe1
    label: security-advisories@github.com
  - url: >-
      https://github.com/nats-io/nats-server/commit/b9ffb63b85e7db3d25a13b2e234f5f7f7c13164d
    label: security-advisories@github.com
  - url: 'https://github.com/nats-io/nats-server/releases/tag/v2.11.16'
    label: security-advisories@github.com
  - url: 'https://github.com/nats-io/nats-server/releases/tag/v2.12.7'
    label: security-advisories@github.com
  - url: 'https://github.com/nats-io/nats-server/releases/tag/v2.14.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/nats-io/nats-server/security/advisories/GHSA-jx8g-9g95-6322
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00463
epssPercentile: 0.37494
ingestedAt: '2026-07-13T15:27:34.282Z'
---

## Overview

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.

## Affected

- `nats-server < 2.11.16`
- `nats-server >= 2.12.0, < 2.12.7`

## Remediation

Upgrade past the affected range:

- `nats-server 2.12.7`