CVE-2026-47263 — Discourse: Prevent webhook payload disclosure on event redelivery

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
discourse / discourse	affected >= 2026.1.0-latest, < 2026.1.4; affected >= 2026.3.0-latest, < 2026.3.1; affected >= 2026.4.0-latest, < 2026.4.1

CWE

CWE-200

References

https://github.com/discourse/discourse/security/advisories/GHSA-wvrm-9v64-m96p

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.