Authenticated Agent Service Result Forgery in Nezha Monitoring

Publication date: 2026-06-12

Last updated on: 2026-06-15

Assigner: GitHub, Inc.

Description

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 0.20.0 to before version 2.0.12, authenticated agents can forge service-monitor results for other users' services. This issue has been patched in version 2.0.12.

CVSS Scores

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Meta Information

Published

2026-06-12

Last Modified

2026-06-15

Generated

2026-07-03

AI Q&A

2026-06-13

EPSS Evaluated

2026-07-02

NVD

CVE-2026-48119

Affected Vendors & Products

Vendor	Product	Version / Range
nezha_monitoring	nezha_monitoring	From 0.20.0 (inc) to 2.0.12 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

The vulnerability exists in Nezha Monitoring, a self-hostable tool for monitoring servers and websites. In versions from 0.20.0 up to but not including 2.0.12, authenticated agents have the ability to forge service-monitor results for services belonging to other users. This means that an attacker with agent-level access can manipulate monitoring data for services they do not own.

Impact Analysis

This vulnerability can impact you by allowing an authenticated agent to falsify monitoring results for other users' services. This could lead to incorrect monitoring data, potentially hiding service outages or issues, misleading administrators, and affecting the reliability of the monitoring system. The integrity of monitoring information is compromised, which may result in delayed responses to real problems or false alarms.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade Nezha Monitoring to version 2.0.12 or later, where the issue has been patched.

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