Nezha WebSocket server stream discloses cross-tenant server telemetry to authenticated members
CVE-2026-47124

6.5MEDIUM

Key Information:

Vendor

Nezhahq

Status
Nezha
Vendor
CVE Published:
12 June 2026

What is CVE-2026-47124?

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.

Affected Version(s)

nezha >= 1.4.0, < 2.0.9

References

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

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.