CVE-2026-47124

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

CVSS 6.5 MEDIUMEPSS 0.3%CWE-200

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.5EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

12 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

nezhahq · nezha

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References

https://github.com/nezhahq/nezha/security/advisories/GHSA-hvv7-hfrh-7gxj