CVE-2026-44785 Details
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 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.
A vulnerability exists in Discourse versions 2026.1.0-latest to prior to 2026.1.4, 2026.3.0-latest to prior to 2026.3.1, and 2026.4.0-latest to prior to 2026.4.1. The issue arises because the AI 'explain' helper only verifies visibility on the post being explained, not on its reply. This oversight allows any authenticated user with access to the AI helper to read the raw contents of a hidden parent post by using the 'Explain' feature on a reply to that post.
Users can upgrade to Discourse versions 2026.1.4, 2026.3.1, 2026.4.1, or 2026.5.0-latest.1. Alternatively, the AI helper 'Explain' feature can be disabled until an upgrade is performed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 15, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/discourse/discourse/security/advisories/GHSA-7h76-fwxc-j586 | [email protected] | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-200 | Exposure of Sensitive Information to an Unauthorized Actor | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| discourse discourse | < 2026.1.0 >= 2026.1.0, < 2026.1.4 >= 2026.3.0, < 2026.3.1 >= 2026.4.0, < 2026.4.1 2026.5.0 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | Initial Analysis | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 12, 2026 | New CVE Received | [email protected] |