CVE-2026-44785 — Discourse: Hidden reply-to post raw can be disclosed through AI explain prompts

Description (CNA)

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 (CNA)

Vendor / product	Versions
discourse / discourse	affected >= 2026.1.0-latest, < 2026.1.4; affected >= 2026.3.0-latest, < 2026.3.1; affected >= 2026.4.0-latest, < 2026.4.1

CWE

CWE-200

References

https://github.com/discourse/discourse/security/advisories/GHSA-7h76-fwxc-j586

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.