CVE-2026-44786
High
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, chat events for public category channels are published to MessageBus without permission scoping, so any MessageBus subscriber without chat enabled could receive chat message payloads in real time. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Discourse
PublishedJun 12, 2026
First seenJun 12, 2026
Weakness typeCWE-200Sensitive information exposure
How to fix
Update
- 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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