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Discourse CVE-2026-27150

LOW
Missing Authorization (CWE-862)
2026-02-26 security-advisories@github.com
Authentication Bypass Discourse
3.8
CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY
3.8 LOW
AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:56 vuln.today
CVE Published
Feb 26, 2026 - 21:28 nvd
LOW 3.8

DescriptionGitHub Advisory

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, missing validate_before_create authorization in Data Explorer's QueryGroupBookmarkable allows any logged-in user to create bookmarks for query groups they don't have access to, enabling metadata disclosure via bookmark reminder notifications. Versions 2025.12.2, 2026.1.1, and 2026.2.0 fix this issue and also make sure validate_before_create throws NotImplementedError in BaseBookmarkable if not implemented, to prevent similar issues in the future. No known workarounds are available.

AnalysisAI

Discourse is an open source discussion platform. [CVSS 3.8 LOW]

Technical ContextAI

Classified as CWE-862 (Missing Authorization). Affects Discourse. Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, missing validate_before_create authorization in Data Explorer's QueryGroupBookmarkable allows any logged-in user to create bookmarks for query groups they don't have access to, enabling metadata disclosure via bookmark reminder notifications. Versions 2025.12.2, 2026.1.1, and 2026.2.0 fix this issue and also make sure validate_before_create throws NotImplementedError in BaseBookmarkable if

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

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CVE-2026-27150 vulnerability details – vuln.today
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