Vulnerability · Published Jun 12, 2026 · Assigned by GitHub_M
CVE-2026-47124Nezha WebSocket server stream discloses cross-tenant server telemetry to authenticated members
Medium 6.5
In plain English
A medium-severity information exposure in nezha from nezhahq. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/nezhahq/nezha | 1.14.15-0.20260517034128-05e5da253519 | GHSA-hvv7-hfrh-7gxj |
| Go | github.com/nezhahq/nezha | 1.14.15-0.20260517034128-05e5da253519 | GO-2026-5439 |
Affected products (as reported)
Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/nezhahq/nezha/security/advisories/GHSA-hvv7-hfrh-7gxj x_refsource_CONFIRM