CVE-2026-27162 | THREATINT

Description

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.

PUBLISHED Reserved 2026-02-18 | Published 2026-02-26 | Updated 2026-02-26 | Assigner GitHub_M

MEDIUM: 4.9CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U

Problem types

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Product status

< 2025.12.2

affected

>= 2026.1.0-latest, < 2026.1.1

affected

>= 2026.2.0-latest, < 2026.2.0

affected

References

github.com/...course/security/advisories/GHSA-gffm-43j4-372w

cve.org (CVE-2026-27162)

nvd.nist.gov (CVE-2026-27162)

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