What’s Vulnerable › Vulnerabilities

CVE-2026-46717: Nezha Monitoring: RoleMember-reachable SSRF with full response-body reflection via POST /api/v1/notification

• Severity: high (CVSS 7.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-12 · updated 2026-10-25
• Weakness: CWE-863

Description

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 1.4.0 to before version 2.0.8, 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.

Affected products

• nezhahq nezha: from 1.4.0, < 2.0.8

References

• https://github.com/nezhahq/nezha/security/advisories/GHSA-w4g9-mxgg-j532
• https://github.com/nezhahq/nezha/security/advisories/GHSA-w4g9-mxgg-j532

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