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BIT-DISCOURSE-2026-31869 Discourse: Composer mentions endpoint leaks hidden group membership through PM `allowed_names` check

🗓️ 27 Mar 2026 07:10:33Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 1 Views

Discourse mentions endpoint leaks hidden group membership to authenticated users who can message the group; patch released and workaround applied.

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02 Apr 2026 13:26Current
6Medium risk
Vulners AI Score6
CVSS 3.14.3
CVSS 45.3
EPSS0.00179
SSVC
1