CVE-2026-47263

MEDIUM

Discourse: Prevent webhook payload disclosure on event redelivery

Title source: cna
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 4.3
EPSS 0.0018
EPSS Percentile 7.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-200
Status published
Products (3)
discourse/discourse >= 2026.1.0-latest, < 2026.1.4
discourse/discourse >= 2026.3.0-latest, < 2026.3.1
discourse/discourse >= 2026.4.0-latest, < 2026.4.1
Published Jun 12, 2026
Tracked Since Jun 13, 2026