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TI-2026-34342 Aliases CVE-2026-46717GHSA-w4g9-mxgg-j532

Nezha Monitoring: RoleMember-reachable SSRF with full response-body reflection via POST /api/v1/notification

Priority HIGH 67CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass, Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863, CWE-918 and the CVSS impact.

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, nezha's dashboard supports two user roles: RoleAdmin (Role==0) and RoleMember (Role==1). The notification routes POST /api/v1/notification and PATCH /api/v1/notification/:id are wired through commonHandler rather than adminHandler — so a RoleMember user can call them. These handlers synchronously Send() an HTTP request to a user-controlled URL and reflect the entire response body (no size limit) back to the caller on any non-2xx response. 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 0.00335 27th percentileScored 2026-11-07
Fix Fixed nezha (nezhahq): 2.0.8github.com/nezhahq/nezha (Go): 1.14.15-0.20260517022419-d06d539d34c1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

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-d06d539d34c11.14.15-0.20260517022419-d06d539d34c1Patch availableGHSA-w4g9-mxgg-j532
  • 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-d06d539d34c1 Fixed in 1.14.15-0.20260517022419-d06d539d34c1 Patch available GHSA-w4g9-mxgg-j532

Remediation

  • Fix · CNA nezha (nezhahq) Fixed in 2.0.8
  • Fix · GHSA-w4g9-mxgg-j532 github.com/nezhahq/nezha (Go) Fixed in 1.14.15-0.20260517022419-d06d539d34c1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-46717
  2. 2026-10-03 Alias added: GHSA-w4g9-mxgg-j532

References

Advisory 1

Other 3

  • TI-2026-65123 Nezha through 2.2.3 Host Header Injection via OAuth2 redirect_uri CVSS 4.0CRITICAL 9.3
  • TI-2026-34341 Nezha Monitoring: RoleMember can run shell on every server (cross-tenant RCE) via POST /api/v1/cron CVSS 3.1CRITICAL 9.9
  • 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