Nezha Monitoring: RoleMember can run shell on every server (cross-tenant RCE) via POST /api/v1/cron
CVE-2026-46716

9.9CRITICAL

Key Information:

Vendor

Nezhahq

Status
Nezha
Vendor
CVE Published:
12 June 2026

What is CVE-2026-46716?

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.

Affected Version(s)

nezha >= 1.4.0, < 2.0.8

References

https://github.com/nezhahq/nezha/security/advisories/GHSA...
x_refsource_CONFIRM

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.