Home/Vulnerability/CVE-2026-44786

CVE-2026-44786

Discourse: Public chat MessageBus broadcasts are not restricted to chat-eligible users

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

7.5CVSS

HIGH

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, chat events for public category channels are published to MessageBus without permission scoping, so any MessageBus subscriber without chat enabled could receive chat message payloads in real time. 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:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

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-j7wq-rf5c-8783

github.com

Timeline

Published

Jun 12, 2026

Last Updated

Jun 12, 2026

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