CVE-2026-33300

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.

PUBLISHED Reserved 2026-03-18 | Published 2026-03-31 | Updated 2026-04-01 | Assigner GitHub_M

Problem types

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

Product status

References

github.com/...course/security/advisories/GHSA-wrwm-vqx2-6x4v

github.com/...ommit/07f66658cce81a099a0d7115db5f3c69f5d3cca2

cve.org (CVE-2026-33300)

nvd.nist.gov (CVE-2026-33300)

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