Description

Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, permalinks pointing to access-restricted resources (private topics, categories, posts, or hidden tags) were redirecting users to URLs containing the resource slug, even when the user didn't have access to view the resource. This leaked potentially sensitive information (e.g., private topic titles) via the redirect Location header and the 404 page's search box. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. No known workarounds are available.

INFO

Published Date :

2026-01-28T20:07:21.266Z

Last Modified :

2026-01-28T21:07:37.739Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-23743 vulnerability.

Vendors Products
Discourse
  • Discourse
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-23743.

URL Resource
https://github.com/discourse/discourse/security/advisories/GHSA-v5jw-rxc6-4cvv cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact