CVE-2026-44783

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, a flaw in how replies to whisper posts are handled allows authenticated users outside the groups configured in whispers_allowed_groups to post into a topic's staff-only whisper channel. The injected content is visible to whisperers (typically staff) alongside legitimate whispers. Only sites that have whispers enabled are affected. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/discourse/discourse/security/advisories/GHSA-98ch-mgfj-wqpw	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:discourse:discourse::::::::
	cpe:2.3:a:discourse:discourse::::::::
	cpe:2.3:a:discourse:discourse::::::::
	cpe:2.3:a:discourse:discourse::::::::
	cpe:2.3:a:discourse:discourse:2026.5.0::::latest:::

History

17 Jun 2026, 18:55

Type	Values Removed	Values Added
References	~~() https://github.com/discourse/discourse/security/advisories/GHSA-98ch-mgfj-wqpw -~~	() https://github.com/discourse/discourse/security/advisories/GHSA-98ch-mgfj-wqpw - Third Party Advisory
First Time		Discourse discourse Discourse
CPE		cpe:2.3:a:discourse:discourse:::::::: cpe:2.3:a:discourse:discourse:2026.5.0::::latest:::

12 Jun 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-12 21:16

Updated : 2026-06-17 18:55

NVD link : CVE-2026-44783

Mitre link : CVE-2026-44783

CVE.ORG link : CVE-2026-44783

JSON object : View

Products Affected

discourse

discourse

CWE

CWE-284

Improper Access Control

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