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BIT-DISCOURSE-2026-55674 Discourse: Cache poisoning/XSS via color scheme cookies

🗓️ 21 Aug 2026 11:26:39Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 5 Views

Unauthenticated XSS in Discourse via unescaped color_scheme_id cookie bypassing CSP.

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21 Aug 2026 12:10Current
6Medium risk
Vulners AI Score6
CVSS 3.19.3
EPSS0.00337
SSVC
5