CVE-2026-44782
Discourse: GroupPostSerializer leaks hidden full names through reaction post association
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
9th
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.
| CWE | CWE-200 |
| Vendor | discourse |
| Product | discourse |
| Published | Jun 12, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
discourse / discourse
>= 2026.1.0-latest, < 2026.1.4 >= 2026.3.0-latest, < 2026.3.1 >= 2026.4.0-latest, < 2026.4.1