CVE-2026-27153
Low
Description
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, moderators could export user Chat DMs via the CSV export endpoint by exploiting an overly permissive allowlist in `can_export_entity?`. The method allowed moderators to export any entity not explicitly blocked instead of restricting to an explicit allowlist. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.
SeverityLow
CVSS2.7
Exploit probability—
Product
Discourse
PublishedFeb 26, 2026
First seenFeb 26, 2026
Weakness typeCWE-863Incorrect authorization
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 |
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