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CVE PROGRAM SOURCE RECORD4.3 Medium

CVE-2026-44782

Discourse: GroupPostSerializer leaks hidden full names through reaction post association

Description

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, GroupPostSerializer declared include_user_long_name? as the predicate for its :name attribute, but AMS looks for include_name?. The misnamed predicate was never called, so object.user.name was always serialized regardless of SiteSetting.enable_names. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

discourse discourse

  • >= 2026.1.0-latest, < 2026.1.4affected
  • >= 2026.3.0-latest, < 2026.3.1affected
  • >= 2026.4.0-latest, < 2026.4.1affected

References