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TI-2026-34341 Aliases CVE-2026-46716GHSA-99gv-2m7h-3hh9

Nezha Monitoring: RoleMember can run shell on every server (cross-tenant RCE) via POST /api/v1/cron

Priority HIGH 76CWE-269Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation, Code execution, Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-269, CWE-78 and CWE-862.

Summary

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 1.4.0 to before version 2.0.8, a RoleMember user can create a scheduled cron task with Cover=CronCoverAll, Servers=[] and an arbitrary Command. At every tick of the scheduler, the dashboard pushes that command to every server in the global ServerShared map — including servers that belong to other tenants (admin's servers, other members' servers). Each agent runs the command and returns the output, which is then sent to the attacker's own NotificationGroup → attacker-controlled webhook. This issue has been patched in version 2.0.8.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0043 37th percentileScored 2026-11-07
Fix Fixed nezha (nezhahq): 2.0.8github.com/nezhahq/nezha (Go): 1.14.15-0.20260517022419-d7526351cf97

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nezhahqnezha1.4.0 to before 2.0.82.0.8Patch availableCNA
—github.com/nezhahq/nezha (Go)1.4.0 to before 1.14.15-0.20260517022419-d7526351cf971.14.15-0.20260517022419-d7526351cf97Patch availableGHSA-99gv-2m7h-3hh9
  • nezha Vendornezhahq Affected 1.4.0 to before 2.0.8 Fixed in 2.0.8 Patch available CNA
  • github.com/nezhahq/nezha (Go) Vendor— Affected 1.4.0 to before 1.14.15-0.20260517022419-d7526351cf97 Fixed in 1.14.15-0.20260517022419-d7526351cf97 Patch available GHSA-99gv-2m7h-3hh9

Remediation

  • Fix · CNA nezha (nezhahq) Fixed in 2.0.8
  • Fix · GHSA-99gv-2m7h-3hh9 github.com/nezhahq/nezha (Go) Fixed in 1.14.15-0.20260517022419-d7526351cf97 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-46716
  2. 2026-10-03 Alias added: GHSA-99gv-2m7h-3hh9

References

Advisory 1

Other 2

  • TI-2026-65123 Nezha through 2.2.3 Host Header Injection via OAuth2 redirect_uri CVSS 4.0CRITICAL 9.3
  • TI-2026-34342 Nezha Monitoring: RoleMember-reachable SSRF with full response-body reflection via POST /api/v1/notification CVSS 3.1HIGH 7.7
  • TI-2026-38597 Nezha Monitoring: OAuth2 Redirect URL — Host Header Injection CVSS 3.1MEDIUM 6.8
  • TI-2026-75131 Memory exhaustion in Nezha file manager WebSocket endpoint CVSS 4.0HIGH 7.1
  • TI-2026-75130 Nezha WebSocket transfer endpoint flaw enables denial of service CVSS 4.0HIGH 7.1
  • TI-2026-67488 Nezha 1.8.0 before 2.3.13 Denial of Service via Notification Mutex Deadlock CVSS 4.0HIGH 7.1
See all 29 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences