Exposure of Information in Discourse Open-Source Discussion Platform

CVE-2026-27934

What is CVE-2026-27934?

Discourse, the popular open-source discussion platform, is impacted by a flaw that allows unauthorized users to access sensitive information, specifically the title and excerpt of posts through a user action API endpoint. This issue arises due to insufficient visibility checks, which could compromise user data and lead to potential data leaks. Users are advised to update to versions 2026.3.0-latest.1, 2026.2.1, or 2026.1.2, which contain necessary patches to mitigate this vulnerability. Unfortunately, there are no known workarounds available.

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References