CVE-2026-62283

Nezha Monitoring: Cross-tenant terminal/file-manager session hijack via WebSocket stream UUID without ownership check

Description

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. Nezha versions 1.14.13 through 1.14.14 and 2.0.0 through 2.0.9 do not bind stream identifiers created by CreateStream in service/rpc/io_stream.go to their creating user, and `GET /ws/terminal/:id` and `GET /ws/file/:id` only check whether the supplied UUID exists. An authenticated RoleMember who obtains a live stream UUID from logs, browser history, referer data, or telemetry can attach to another user's terminal or file-manager session, read and write target-server files, and execute shell commands. This issue is fixed in version 2.0.10.

Scores

Weaknesses (CWE)

• CWE-639
• CWE-862

Advisories

• GHSA-q6xx-5vr8-p898 — Nezha vulnerable to cross-tenant terminal/file-manager session hijack via WebSocket stream UUID without ownership check
• GO-2026-5821 — Nezha vulnerable to cross-tenant terminal/file-manager session hijack via WebSocket stream UUID without ownership check in github.com/nezhahq/nezha

European references

• ENISA EUVD · EUVD-2026-64139
• GCVE · GCVE-0-2026-62283

Affected products

References

• https://github.com/nezhahq/nezha/security/advisories/GHSA-q6xx-5vr8-p898
• https://github.com/nezhahq/nezha/commit/6661d6a7fc1c269f55c7f4e775082ad23fbe0f54
• https://github.com/nezhahq/nezha/releases/tag/v2.0.10

Sources