CVE-2026-49397
Received Received - Intake
Nezha Monitoring Private Service Enumeration Vulnerability

Publication date: 2026-06-12

Last updated on: 2026-06-12

Assigner: GitHub, Inc.

Description
Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.0 to before version 2.0.14, private services (`EnableShowInService: false`) are enumerable via per-server endpoints, leaking name and timing data. This issue has been patched in version 2.0.14.
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Meta Information
Published
2026-06-12
Last Modified
2026-06-12
Generated
2026-06-13
AI Q&A
2026-06-13
EPSS Evaluated
N/A
NVD
CVE-2026-49397
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
nezha_monitoring nezha_monitoring From 2.0.0 (inc) to 2.0.14 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
CWE-285 The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
CWE-200 The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
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Executive Summary

This vulnerability affects Nezha Monitoring versions from 2.0.0 up to but not including 2.0.14. It allows private services, which are supposed to be hidden (with the setting EnableShowInService set to false), to be enumerated through per-server endpoints. This means that information such as the names and timing data of these private services can be accessed or leaked unintentionally.

Compliance Impact

This vulnerability allows enumeration of private services, leaking their names and timing data via per-server endpoints. Such leakage of potentially sensitive information could impact compliance with data protection regulations like GDPR or HIPAA, which require safeguarding of personal and sensitive data. However, the CVE description does not explicitly mention any direct compliance impact or regulatory considerations.

Impact Analysis

The impact of this vulnerability is that sensitive information about private services, including their names and timing data, can be exposed to unauthorized parties. This could potentially allow attackers to gain insights into the monitored infrastructure, which might be used for further attacks or reconnaissance. The CVSS score of 5.3 indicates a medium severity with network attack vector and no privileges or user interaction required.

Mitigation Strategies

To mitigate this vulnerability, upgrade Nezha Monitoring to version 2.0.14 or later, where the issue has been patched.

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