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VULNERABILITIES

CVE-2026-23743 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/discourse/discourse/security/advisories/GHSA-v5jw-rxc6-4cvv [email protected]Third Party Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-200Exposure of Sensitive Information to an Unauthorized Actor[email protected]

Affected Products

ProductVersions
discourse discourse
< 3.5.4
>= 2025.11.0, < 2025.11.2
2025.12.0
2026.1.0

CPE

  • cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*
  • cpe:2.3:a:discourse:discourse:2025.12.0:*:*:*:stable:*:*:*
  • cpe:2.3:a:discourse:discourse:2026.1.0:*:*:*:stable:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-23743
NVD Published Date:
Jan 28, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]