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PatchSiren cyber security CVE debrief

CVE-2026-46717 nezhahq CVE debrief

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.

Vendor
nezhahq
Product
nezha
CVSS
HIGH 7.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-12
Original CVE updated
2026-06-15
Advisory published
2026-06-12
Advisory updated
2026-06-15

Who should care

Users of Nezha Monitoring versions 1.4.0 to 2.0.7 should be aware of this vulnerability.

Technical summary

The vulnerability has a CVSS score of 7.7 and is classified as HIGH. It allows a RoleMember user to send an HTTP request to a user-controlled URL and reflect the entire response body back to the caller on any non-2xx response.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade to Nezha Monitoring version 2.0.8 or later.
  • Restrict access to the notification routes to only admin users.

Evidence notes

The vulnerability was patched in version 2.0.8.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-46717 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-46717

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-46717 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46717

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.