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OpenAdvisories
Medium · 6.5 CVE-2026-47124 EUVD-2026-36594GHSA-hvv7-hfrh-7gxjGO-2026-5439

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

Published Jun 12, 2026 · Updated Jun 15, 2026 · Assigned by GitHub_M

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 products

VendorProductAffectedFixed
nezhahq nezha >= 1.4.0, < 2.0.9 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 govulncheck-vulndb 0.0.20260723T184607-160000.1.1 openSUSE-SU-2026:21483-1

Affected packages

EcosystemPackageAffectedFixedRecord
Go github.com/nezhahq/nezha >= 1.4.0, < 1.14.15-0.20260517034128-05e5da253519 1.14.15-0.20260517034128-05e5da253519 GHSA-hvv7-hfrh-7gxj

Advisories 1

References