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

Back Back to CVE browser

MEDIUM

Discourse: Prevent webhook payload disclosure on event redelivery

Published Jun 12, 2026

4.3

MEDIUM

CVSS 3.1

EPSS 0.36%

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.

Affected products

Vendor Discourse Product Discourse Default
n/a
- Version
  >= 2026.1.0-latest, < 2026.1.4
  Status
  affected
  Constraints
  -
- Version
  >= 2026.3.0-latest, < 2026.3.1
  Status
  affected
  Constraints
  -
- Version
  >= 2026.4.0-latest, < 2026.4.1
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Discourse

n/a

Version	Status	Constraints
>= 2026.1.0-latest, < 2026.1.4	affected	-
>= 2026.3.0-latest, < 2026.3.1	affected	-
>= 2026.4.0-latest, < 2026.4.1	affected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-200

Exposure of Sensitive Information

References (2)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-36560
Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-wvrm-9v64-m96p
x_refsource_CONFIRMThird Party Advisory

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-36560		Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-wvrm-9v64-m96p		x_refsource_CONFIRMThird Party Advisory