CVE-2026-27162CWE-200

DIscourse doesn't prevent whispers to leak in excerpts

Medium · published February 26, 2026

CVSS v4.0
4.9
EPSS
0%
Percentile
34.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
4.9 · MEDIUM
Vector
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
EPSS
0.00409 · 34.0th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2026-02-26T19:58Z
EPSS history
Timeline
  • 26 FEB 19:58Z
    DIscourse doesn't prevent whispers to leak in excerpts
    cvelistv5