BIT-DISCOURSE-2026-45788 Discourse: Secure uploads exposed by hotlinked image copying

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, secure uploads could be exposed by pullhotlinkedimages when an attacker knew the secured upload URL and the secureuploads site setting was enabled. This issue is fixed in versions 2026.6.0,...