CVE-2026-45780

CVE-2026-45780 affects Discourse prior to versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5. The issue arises in EventSerializer, which could expose invited group names, sample invitees, and attendance statistics to users who could view the topic but were not entitled to view the private event ...

CVE-2026-45780 Discourse: Private event sample invitees are serialized to non-invited event viewers

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, EventSerializer could expose invited group names, sample invitees, and attendance statistics to users who could view the topic but were not entitled to view the private event invitee list. This...