Home/Vulnerability/CVE-2026-47263

CVE-2026-47263

Discourse: Prevent webhook payload disclosure on event redelivery

Published: Jun 12, 2026Updated: Jun 12, 2026 Sources: CVE List NVD

4.3CVSS

MEDIUM

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.

EPSS Score

N/A

CISA KEV

Not in KEV

Exploits

No Known Exploits

Remediation

No Fix Available

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:RUser Interaction

Required

Scope

S:UScope

Unchanged

Impact

C:LConfidentiality

Low

I:NIntegrity

None

A:NAvailability

None

Weaknesses

CWE-200

Affected Products

discourse

Web & CMS Plugins / forum-wiki

discoursecommercialUSWeb & CMS Pluginsaka discourse.org

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique

Collection

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References

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

github.com

Timeline

Published

Jun 12, 2026

Last Updated

Jun 12, 2026

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