Discourse is an open-source discussion platform. From versions 2026.1.0 to before 2026.1.3, and 2026.2.0 to before 2026.2.2, an authenticated user can obtain shared draft topic titles by sending an inline onebox request with a category_id parameter matching the shared drafts category. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
{
"severity": "Medium",
"cpes": [
"cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*"
]
}