medium5.0
CVE-2026-33185
Discourse is an open-source discussion platform.
Impact
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, the group email settings test endpoint could be used to make the server initiate outbound connections to arbitrary hosts and ports. This could allow probing of internal network infrastructure. The endpoint was accessible to non-staff group owners. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Discourse | Discourse | from 2026.1.0 before 2026.1.3 from 2026.2.0 before 2026.2.2 Version 2026.3.0 |