CVE-2026-47263 PUBLISHED

Discourse: Prevent webhook payload disclosure on event redelivery

Assigner: GitHub_M
Reserved: 18.05.2026 Published: 12.06.2026 Updated: 12.06.2026

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/<id> 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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CVSS Score: 4.3

Product Status

Vendor discourse
Product discourse
Versions
  • Version >= 2026.1.0-latest, < 2026.1.4 is affected
  • Version >= 2026.3.0-latest, < 2026.3.1 is affected
  • Version >= 2026.4.0-latest, < 2026.4.1 is affected

References

Problem Types

  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE