Security Advisory

CVE-2026-23743

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-01-28 20:07:21

Last updated 2026-01-28 21:07:37

Assigner GitHub_M

State PUBLISHED

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 didnt have access to view the resource. This leaked potentially sensitive information (e.g., private topic titles) via the redirect Location header and the 404 pages 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.

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