What is the CVSS score of CVE-2026-27162?

CVE-2026-27162 has a CVSS 3.1 base score of 4.9 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

Which versions of Discourse are affected by CVE-2026-27162?

Organizations using Discourse should be aware of moderate risk from CVE-2026-27162, a information exposure vulnerability rated CVSS 4.9.

How to fix or mitigate CVE-2026-27162?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Review data exposure and access controls.

Discourse CVE-2026-27162

MEDIUM

Information Exposure (CWE-200)

2026-02-26 security-advisories@github.com

Information Disclosure Discourse

4.9

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

4.9 MEDIUM

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

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:56 vuln.today

CVE Published

Feb 26, 2026 - 21:28 nvd

MEDIUM 4.9

DescriptionGitHub Advisory

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, posts_nearby was checking topic access but then returning all posts regardless of type, including whispers that should only be visible to whisperers. Use Post.secured(guardian) to properly filter post types based on user permissions. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.

AnalysisAI

Discourse's posts_nearby function fails to properly filter whispered posts based on user permissions, allowing authenticated users with high privileges to view confidential whispers intended only for specific recipients. The vulnerability stems from inadequate post-type filtering that bypasses guardian-based access controls. No patch is currently available for affected versions prior to 2025.12.2, 2026.1.1, and 2026.2.0.

Technical ContextAI

Classified as CWE-200 (Information Exposure). Affects Discourse. Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, posts_nearby was checking topic access but then returning all posts regardless of type, including whispers that should only be visible to whisperers. Use Post.secured(guardian) to properly filter post types based on user permissions. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.