---
id: CVE-2026-58252
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 could receive messages on denied subjects when a wildcard
  subscription overlapp…
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-2026-58252'
references:
  - url: >-
      https://github.com/nats-io/nats-server/commit/8ced85a11497f86704a95d960281480ce037386b
    label: security-advisories@github.com
  - url: >-
      https://github.com/nats-io/nats-server/commit/a42a6d1e258eb5c3a2190384d31965a4b715e854
    label: security-advisories@github.com
  - url: >-
      https://github.com/nats-io/nats-server/commit/e611ca9604697b02d8f22beb76037400a9cf72e6
    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-wh7g-5m82-pmhr
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00464
epssPercentile: 0.39322
ingestedAt: '2026-07-13T15:27:34.300Z'
---

## 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 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

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

## Remediation

Upgrade past the affected range:

- `nats-server 2.12.7`