CVE ID :CVE-2026-55103 Published : Oct. 15, 2026, 6:17 p.m. | 1 hour, 16 minutes ago Description :Discourse ActivityPub adds ActivityPub support to Discourse. Prior to commit 1c8518b0f2abdf31cbea3e0b242f74d8994a9ba5, inbound ActivityPub processing does not sufficiently verify that the actor...

#Sicherheitslücke #Update

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ARTICLEVIEW

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

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