Medium severity · published Jun 12, 2026
CVE-2026-47124
Nezha WebSocket server stream discloses cross-tenant server telemetry to authenticated members
6.5
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
nezha · nezhahq
>= 1.4.0, < 2.0.9 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47124
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-47124
github.com
https://github.com/nezhahq/nezha/security/advisories/GHSA-hvv7-hfrh-7gxj
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