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CVE Vulnerability Details :
CVE-2026-28227
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-26 Feb, 2026 | 21:27
Updated At-26 Feb, 2026 | 21:27
Rejected At-
▼CVE Numbering Authority (CNA)
Discourse Vulnerable to Unauthorized Topic Creation in Staff-Only Categories via Topic Timer publish_to_category

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.

Affected Products
Vendor
Civilized Discourse Construction Kit, Inc.discourse
Product
discourse
Versions
Affected
  • < 2025.12.2
  • >= 2026.1.0-latest, < 2026.1.1
  • >= 2026.2.0-latest, < 2026.2.0
Problem Types
TypeCWE IDDescription
CWECWE-863CWE-863: Incorrect Authorization
Type: CWE
CWE ID: CWE-863
Description: CWE-863: Incorrect Authorization
Metrics
VersionBase scoreBase severityVector
4.01.2LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U
Version: 4.0
Base score: 1.2
Base severity: LOW
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/discourse/discourse/security/advisories/GHSA-m49w-78mh-87jp
x_refsource_CONFIRM
Hyperlink: https://github.com/discourse/discourse/security/advisories/GHSA-m49w-78mh-87jp
Resource:
x_refsource_CONFIRM
Details not found