CVE-2026-27162

MEDIUM

Discourse <2025.12.2/2026.1.1/2026.2.0 - Info Disclosure

Title source: llm

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.

References (1)

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

Scores

CVSS v3 4.9

EPSS 0.0003

EPSS Percentile 8.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-200

Status published

Products (2)

discourse/discourse 2026.2.0

discourse/discourse < 2025.12.2

Published Feb 26, 2026

Tracked Since Feb 27, 2026