Main Vulnerability Database Vulnerabilities #VU122119

Missing Authorization in Discourse - CVE-2026-21865

Published: January 29, 2026

Vulnerability identifier: #VU122119

CSH Severity: Low

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2026-21865

CWE-ID: CWE-862

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: Civilized Discourse Construction Kit, Inc.

Affected software:
Discourse

Detailed vulnerability description

The vulnerability allows a remote user to bypass authorization process.

The vulnerability exists due to missing authorization. A remote administrator can convert some personal messages to public topics.

Install updates from vendor's website.