CVE-2026-44785

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.

PUBLISHED Reserved 2026-05-07 | Published 2026-06-12 | Updated 2026-06-15 | Assigner GitHub_M

Problem types

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Product status

References

github.com/...course/security/advisories/GHSA-7h76-fwxc-j586

cve.org (CVE-2026-44785)

nvd.nist.gov (CVE-2026-44785)

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