CVE-2026-47124CWE-200

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

Medium · published June 12, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
29.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00371 · 29.8th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2026-06-12T21:03Z
EPSS history
Timeline
  • 12 JUN 21:03Z
    Nezha WebSocket server stream discloses cross-tenant server telemetry to authenticated members
    cvelistv5