CVE-2026-28227

LOW

Discourse <2025.12.2 - Auth Bypass

Title source: llm

Description

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, TL4 users can publish topics into staff-only categories via the `publish_to_category` topic timer, bypassing authorization checks. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.

References (1)

[Vendor Advisory] https://github.com/discourse/discourse/security/advisories/GHSA-m49w-78mh-87jp

Scores

CVSS v3 2.7

EPSS 0.0003

EPSS Percentile 9.5%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

Classification

CWE

CWE-863

Status published

Affected Products (2)

discourse/discourse < 2025.12.2

discourse/discourse

Timeline

Published Feb 26, 2026

Tracked Since Feb 27, 2026