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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2026-33300

Discourse: Hidden group names and access metadata are exposed to moderators through the `category-chatables` endpoint

Description

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass in the Category Chatables Controller show action allowed moderators to get information on hidden groups names and user count. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

discourse discourse

  • >= 2026.1.0-latest, < 2026.1.3affected
  • >= 2026.2.0-latest, < 2026.2.2affected
  • >= 2026.3.0-latest, < 2026.3.0affected

References