CVE-2026-44783

Discourse: Replying to a whisper lets non-whisperers create staff-only whisper posts

State: Published
Severity: 5.4 Medium
Published: Jun 12, 2026
Updated: Jun 15, 2026
Reserved: May 7, 2026

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, 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.

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N	GitHub_M

Weaknesses

CWE-284 Improper Access Control

Affected Products

Product	Versions
discoursediscourse	>= 2026.1.0-latest, < 2026.1.4Affected >= 2026.3.0-latest, < 2026.3.1Affected >= 2026.4.0-latest, < 2026.4.1Affected

References

https://github.com/discourse/discourse/security/advisories/GHSA-98ch-mgfj-wqpw

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