CVE-2026-47124

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

State: Published
Severity: 6.5 Medium
Published: Jun 12, 2026
Updated: Jun 15, 2026
Reserved: May 18, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	GitHub_M

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Affected Products

Product	Versions
nezhanezhahq	>= 1.4.0, < 2.0.9Affected

References

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

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.