CVE-2026-32618

MEDIUM

Discourse: Unauthorized channel membership inference via excluded_memberships_channel_id

Title source: cna

Description

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, there is possible channel membership inference from chat user search without authorization. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

References (2)

[X_Refsource_Confirm] https://github.com/discourse/discourse/security/advisories/GHSA-pc8p-w2m7-hgf3

[X_Refsource_Misc] https://github.com/discourse/discourse/commit/81fd89e744058e509412158e5e6ac90c856ade64

View Writeup ZIP pw:eip

Scores

CVSS v3 4.3

Attack Vector NETWORK

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

Details

CWE

CWE-200

Status published

Products (3)

discourse/discourse >= 2026.1.0-latest, < 2026.1.3

discourse/discourse >= 2026.2.0-latest, < 2026.2.2

discourse/discourse >= 2026.3.0-latest, < 2026.3.0

Published Mar 31, 2026

Tracked Since Mar 31, 2026