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, the MessageBus.publish call for /web_hook_events/ in Jobs::RedeliverWebHookEvents did not pass group_ids, leaving the channel readable by any authenticated user (or anonymous user on instances where login_required is disabled). Webhook IDs are sequential integers and trivially enumerable. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-200"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47263.json"
}{
"extracted_events": [
{
"introduced": "2026.1.0-latest"
},
{
"fixed": "2026.1.4"
},
{
"introduced": "2026.3.0-latest"
},
{
"fixed": "2026.3.1"
},
{
"introduced": "2026.4.0-latest"
},
{
"fixed": "2026.4.1"
}
],
"source": "AFFECTED_FIELD"
}