---
id: CVE-2026-27481
title: Discourse is an open-source discussion platform
summary: >-
  Discourse is an open-source discussion platform. From versions 2026.1.0-latest
  to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to
  before 2026.3.0, an authorization bypass vulnerability allows unauthenticated
  o…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-200
vendor: discourse
product: discourse
affected:
  - 'discourse >= 2026.1.0, <= 2026.1.2'
  - 'discourse >= 2026.2.0, <= 2026.2.1'
  - discourse = 2026.3.0
published: '2026-04-03'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-27481'
references:
  - url: >-
      https://github.com/discourse/discourse/security/advisories/GHSA-6c9x-3vrp-682x
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00229
epssPercentile: 0.14009
ingestedAt: '2026-07-25T22:05:05.039Z'
---

## Overview

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass vulnerability allows unauthenticated or unauthorized users to view hidden (staff-only) tags and its associated data. All Discourse instances with tagging enabled and staff-only tag groups configured are impacted. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

## Affected

- `discourse >= 2026.1.0, <= 2026.1.2`
- `discourse >= 2026.2.0, <= 2026.2.1`
- `discourse = 2026.3.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.