CVE-2026-44782
Discourse: GroupPostSerializer leaks hidden full names through reaction post association
4.3
MEDIUM
CVSS 3.1
EPSS 0.19%
Description
Discourse is an open-source discussion platform. From versions 2026.1.0 to before 2026.1.4, 2026.3.0 to before 2026.3.1, and 2026.4.0 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.
How to fix CVE-2026-44782
To remediate CVE-2026-44782, upgrade the affected package to a fixed version below.
- —upgrade to 2026.1.4 or later
Is CVE-2026-44782 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 2026.1.0, < 2026.1.4, >= 2026.3.0, < 2026.3.1, >= 2026.4.0, < 2026.4.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |