CVE-2026-62283: critical vulnerability in nezhahq nezha
Nezha Monitoring: Cross-tenant terminal/file-manager session hijack via WebSocket stream UUID without ownership check
Published
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.9epss 0.6%
exploitation probability
0.6%top 55% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
nezhahq · nezhaRelated CVEs — nezhahq nezha
In the same product, most dangerous first.
CVE-2026-53519CRITICALNezha Monitoring: Pre-auth path traversal via /dashboard.. prefix confusion leaks jwt_secret_keyEPSS 2.3%CVE-2026-46716CRITICALNezha Monitoring: RoleMember can run shell on every server (cross-tenant RCE) via POST /api/v1/cronEPSS 0.5%CVE-2026-59155MEDIUMNezha Monitoring: DDNS and Notification credential exposure via unredacted list APIEPSS 0.5%CVE-2026-100394MEDIUMNezha Monitoring: Whole-instance DoS in Nezha dashboard: a member can crash the process for every tenantEPSS 0.4%CVE-2026-53522MEDIUMNezha Monitoring: Unbounded WebSocket Streams — Resource Exhaustion DoSEPSS 0.4%CVE-2026-53520MEDIUMNezha Monitoring: Authenticated users can claim the dashboard Host through NAT and preempt all dashboard routingEPSS 0.4%