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Tool Directory

CVE-2026-46716

CriticalPublished

Nezha Monitoring: RoleMember can run shell on every server (cross-tenant RCE) via POST /api/v1/cron

Published: Jun 12, 2026
Updated: Jun 15, 2026
Assigning CNA: GitHub_M
Evidence observed: Aug 17, 2026

Primary CVSS

9.9/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS probability estimate

0.4%

Low · next 30 days

Percentile: 36.7%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 1.4.0 to before version 2.0.8, a RoleMember user can create a scheduled cron task with Cover=CronCoverAll, Servers=[] and an arbitrary Command. At every tick of the scheduler, the dashboard pushes that command to every server in the global ServerShared map — including servers that belong to other tenants (admin's servers, other members' servers). Each agent runs the command and returns the output, which is then sent to the attacker's own NotificationGroup → attacker-controlled webhook. This issue has been patched in version 2.0.8.

Sources

POC_CVE-2026-46716PoC
Reproducible lab environment for CVE-2026-46716, a critical cross-tenant RCE in Nezha Monitoring via cron API authorization bypass. Includes Nuclei detection template and Docker-based vulnerable/patched clusters.

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