CVE-2026-44782
Last modified
CVE-2026-44782 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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?. EPSS estimates a 0.19% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Discourse | Discourse | < 2026.1.0 |
| Discourse | Discourse | >= 2026.1.0, < 2026.1.4 |
| Discourse | Discourse | >= 2026.3.0, < 2026.3.1 |
| Discourse | Discourse | >= 2026.4.0, < 2026.4.1 |
| Discourse | Discourse | 2026.5.0 |
References
- https://github.com/discourse/discourse/security/advisories/GHSA-h3mq-9r6w-h33jThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-44782?
How severe is CVE-2026-44782?
How do I fix CVE-2026-44782?
Are you affected by CVE-2026-44782?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST