CVE-2026-27152
Low
Description
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, DM communication-preference bypass when adding members via `Chat::AddUsersToChannel` — a user could add targets who have blocked/ignored/muted them to an existing DM channel, bypassing per-recipient PM restrictions that are enforced during DM channel creation. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.
SeverityLow
CVSS3.8
Exploit probability—
Product
Discourse
PublishedFeb 26, 2026
First seenFeb 26, 2026
Weakness typeCWE-284Improper access control
How to fix
Update
- discourse discourse2025.12.2, 2026.1.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| discourse discourse | v < 2025.12.2, 2026.1.0 ≤ v < 2026.1.1, 2026.2.0 | 2025.12.2, 2026.1.1 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.