Discourse Deleted Posts Auth Bypass Fixed in 2026.3.0-latest.1
CVE-2026-33428 Published on March 20, 2026
Discourse Allows Unauthorized Access to Deleted Posts Index via Group Membership
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a non-staff user with elevated group membership could access deleted posts belonging to any user due to an overly broad authorization check on the deleted posts index endpoint. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2026-33428 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-33428
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Affected Versions
discourse:- Version = 2026.3.0-latest is affected.
- Version >= 2026.2.0-latest, < 2026.2.1 is affected.
- Version >= 2026.1.0-latest, < 2026.1.2 is affected.