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OpenAdvisories
Medium · 4.3 CVE-2026-32951 EUVD-2026-17565

Discourse: Authorization bypass in oneboxer via user-controlled category id

Published Mar 31, 2026 · Updated Apr 1, 2026 · Assigned by GitHub_M

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 authenticated user can obtain shared draft topic titles by sending an inline onebox request with a category_id parameter matching the shared drafts category. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

Affected products

VendorProductAffectedFixed
discourse discourse >= 2026.1.0-latest, < 2026.1.3, >= 2026.2.0-latest, < 2026.2.2, >= 2026.3.0-latest, < 2026.3.0 —

References