PT-2026-48980 · Discourse · Discourse

Published 2026-06-12 · Updated 2026-06-12 · CVE-2026-44783

Mitre

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

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.

Fix

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

CVE-2026-44783

Affected Products

Discourse

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-44783 · Security Note
• https://github.com/discourse/discourse/security/advisories/GHSA-98ch-mgfj-wqpw · Note