medium4.3
CVE-2026-44785
Discourse is an open-source discussion platform.
Impact
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 AI "explain" helper only checks can_see? on the post being explained, not its reply_to_post, so any authenticated user with access to the AI helper could read the raw contents of a hidden parent post by invoking "Explain" on a reply to it. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Discourse | Discourse | before 2026.1.0 from 2026.1.0 before 2026.1.4 from 2026.3.0 before 2026.3.1 from 2026.4.0 before 2026.4.1 Version 2026.5.0 |