CVE-2023-26040: Discourse

Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Discourse is an open-source discussion platform. Between versions 3.1.0.beta2 and 3.1.0.beta3 of the `tests-passed` branch, editing or responding to a chat message containing malicious content could lead to a cross-site scripting attack. This issue is patched in version 3.1.0.beta3 of the `tests-passed` branch. There are no known workarounds.

Affected products

Published 2023-03-17. Last modified 2026-06-17.