CVE-2026-27162 — DIscourse doesn't prevent whispers to leak in excerpts
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, `posts_nearby` was checking topic access but then returning all posts regar…
Published: 2026-02-26 · CVSS: 4.9 · CVSS 4.0
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, `posts_nearby` was checking topic access but then returning all posts regardless of type, including whispers that should only be visible to whisperers. Use `Post.secured(guardian)` to properly filter post types based on user permissions. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7