Discourse
CVE-2026-27162
MEDIUM
Severity by source
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
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
2DescriptionGitHub 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. …
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Vulnerability AssessmentAI
| Risk Assessment | CVSS 4.9 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker could exploit this vulnerability to compromise the affected system. |
| Remediation | Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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