CVE-2026-47124: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in nezhahq nezha
Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 1.4.0 to before version 2.0.9, any authenticated non-admin member can connect to the server-status WebSocket and receive telemetry for all servers, including servers owned by other users. The normal server list API filters objects by HasPermission, but the WebSocket stream treats the presence of any authenticated user as authorization for the full unfiltered server list. This issue has been patched in version 2.0.9.
AI Analysis
Technical Summary
Nezha Monitoring is a self-hosted server and website monitoring tool. In versions >=1.4.0 and <2.0.9, the server-status WebSocket endpoint does not enforce proper authorization checks and allows any authenticated user, including non-admins, to receive telemetry data for all servers, including those owned by other users. This contrasts with the server list API, which correctly filters servers based on user permissions. The vulnerability results in unauthorized exposure of sensitive telemetry information. The issue was addressed and patched in version 2.0.9.
Potential Impact
Unauthorized authenticated users can access sensitive telemetry data for all servers monitored by Nezha, including those they do not own or have permission to view. This exposure could lead to information disclosure about server status and operations. There is no indication of impact on integrity or availability.
Mitigation Recommendations
Upgrade Nezha Monitoring to version 2.0.9 or later, where this vulnerability has been patched. No other mitigation or temporary workaround is indicated.
CVE-2026-47124: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in nezhahq nezha
Description
Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 1.4.0 to before version 2.0.9, any authenticated non-admin member can connect to the server-status WebSocket and receive telemetry for all servers, including servers owned by other users. The normal server list API filters objects by HasPermission, but the WebSocket stream treats the presence of any authenticated user as authorization for the full unfiltered server list. This issue has been patched in version 2.0.9.
CVSS v3.1
Score 6.5medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Nezha Monitoring is a self-hosted server and website monitoring tool. In versions >=1.4.0 and <2.0.9, the server-status WebSocket endpoint does not enforce proper authorization checks and allows any authenticated user, including non-admins, to receive telemetry data for all servers, including those owned by other users. This contrasts with the server list API, which correctly filters servers based on user permissions. The vulnerability results in unauthorized exposure of sensitive telemetry information. The issue was addressed and patched in version 2.0.9.
Potential Impact
Unauthorized authenticated users can access sensitive telemetry data for all servers monitored by Nezha, including those they do not own or have permission to view. This exposure could lead to information disclosure about server status and operations. There is no indication of impact on integrity or availability.
Mitigation Recommendations
Upgrade Nezha Monitoring to version 2.0.9 or later, where this vulnerability has been patched. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-18T19:50:18.694Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2c7c90e617e2d834c6c7ac
Added to database: 06/12/2026, 21:39:28 UTC
Last enriched: 06/21/2026, 15:15:46 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 62
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