CVE-2026-27162

DIscourse doesn't prevent whispers to leak in excerpts

State: Published
Severity: 4.9 Medium
Published: Feb 26, 2026
Updated: Mar 3, 2026
Reserved: Feb 18, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	4.9 Medium	CVSS: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	GitHub_M

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Affected Products

Product	Versions
discoursediscourse	< 2025.12.2Affected >= 2026.1.0-latest, < 2026.1.1Affected >= 2026.2.0-latest, < 2026.2.0Affected

References

https://github.com/discourse/discourse/security/advisories/GHSA-gffm-43j4-372w

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