CVE-2026-47263
Description
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, the MessageBus.publish call for /web_hook_events/<id> in Jobs::RedeliverWebHookEvents did not pass group_ids, leaving the channel readable by any authenticated user (or anonymous user on instances where login_required is disabled). Webhook IDs are sequential integers and trivially enumerable. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
How to fix
- discourse discourse2026.1.0, 2026.1.4, 2026.3.1, 2026.4.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| discourse discourse | v < 2026.1.0, 2026.1.0 ≤ v < 2026.1.4, 2026.3.0 ≤ v < 2026.3.1, 2026.4.0 ≤ v < 2026.4.1, 2026.5.0 | 2026.1.0, 2026.1.4, 2026.3.1, 2026.4.1 |
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Attack Surface Management
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