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CVE-2026-55103 Discourse ActivityPub: Fix inbound actor validation and apply outbound request SSRF hardening

🗓️ 15 Oct 2026 17:05:41Reported by GoogleType 
osv-cve
 osv-cve
🔗 osv.dev👁 1 Views

Remote attacker can edit, delete, or reply to federated posts in Discourse ActivityPub.

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16 Oct 2026 02:48Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.18.6
1