CVE-2026-27935CWE-201

Discourse leaks private topic metadata to non-authorized users

Medium · published March 19, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
41.1
In the wild
Unconfirmed
What it is

Discourse is an open-source discussion platform. Versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 have a vulnerability in an API endpoint that discloses private topic metadata of admin users to moderator users even if the moderators do not have access to the private topics. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00488 · 41.1th percentile
Weakness
CWE-201 · Insertion of Sensitive Information Into Sent Data
Published
2026-03-19T21:33Z
EPSS history
Timeline
  • 19 MAR 21:33Z
    Discourse leaks private topic metadata to non-authorized users
    cvelistv5