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CVE-2026-53520— Nezha Monitoring: Authenticated users can claim the dashboard Host through NAT and preempt all dashboard routing

Quick assessment

Affected
nezhahq nezha
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Nezha Monitering是Nezha Monitoring组织开源的一款自托管、轻量级的服务器和网站监控及运维工具。 Nezha Monitoring 2.0.14版本至2.1.0之前版本存在权限许可和访问控制问题漏洞，该漏洞源于访问控制问题，可能导致已认证用户通过NAT声明dashboard Host并抢占所有dashboard路由。

CVSS 6.5 · Medium EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
nezhahq nezha >= 2.0.14, < 2.1.0 affected
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I. Basic Information for CVE-2026-53520

Vulnerability Information
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Vulnerability Title
Nezha Monitoring: Authenticated users can claim the dashboard Host through NAT and preempt all dashboard routing
Source: CVE Program / CVE List V5
Vulnerability Description
Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.14 to before version 2.1.0, authenticated users can claim the dashboard Host through NAT and preempt all dashboard routing. This issue has been patched in version 2.1.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nezha Monitoring 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nezha Monitering是Nezha Monitoring组织开源的一款自托管、轻量级的服务器和网站监控及运维工具。 Nezha Monitoring 2.0.14版本至2.1.0之前版本存在权限许可和访问控制问题漏洞，该漏洞源于访问控制问题，可能导致已认证用户通过NAT声明dashboard Host并抢占所有dashboard路由。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nezhahq nezha >= 2.0.14, < 2.1.0 -

II. Public POCs for CVE-2026-53520

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III. Intelligence Information for CVE-2026-53520

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Vendor Advisories for CVE-2026-53520 (1)

Same Patch Batch · nezhahq · 2026-06-12 · 13 CVEs total

CVE-2026-46716 9.9 CRITICAL Nezha Monitoring: RoleMember can run shell on every server (cross-tenant RCE) via POST /ap
CVE-2026-53519 9.1 CRITICAL Nezha Monitoring: Pre-auth path traversal via /dashboard.. prefix confusion leaks jwt_secr
CVE-2026-46717 7.7 HIGH Nezha Monitoring: RoleMember-reachable SSRF with full response-body reflection via POST /a
CVE-2026-47120 7.1 HIGH Nezha Monitoring: RoleMember can fire other users' cron tasks via AlertRule.FailTriggerTas
CVE-2026-48119 7.1 HIGH Nezha Monitoring: Authenticated agents can forge service-monitor results for other users'
CVE-2026-49396 7.1 HIGH Nezha Monitoring: Cross-site GET request can trigger stored cron commands on a victim's ag
CVE-2026-53523 6.8 MEDIUM Nezha Monitoring: OAuth2 Redirect URL — Host Header Injection
CVE-2026-53522 6.5 MEDIUM Nezha Monitoring: Unbounded WebSocket Streams — Resource Exhaustion DoS
CVE-2026-47124 6.5 MEDIUM Nezha WebSocket server stream discloses cross-tenant server telemetry to authenticated mem
CVE-2026-53521 6.4 MEDIUM Nezha Monitoring: Stored future DDNS profile ID allows unauthorized use of another user's
CVE-2026-47268 6.4 MEDIUM Nezha Monitoring: Authenticated DDNS webhook configuration allows blind SSRF from the dash
CVE-2026-49397 5.3 MEDIUM Nezha Monitoring: Private services (`EnableShowInService: false`) are enumerable via per-s

IV. Related Vulnerabilities

Same product: nezha
Same vendor: nezhahq
Same weakness: CWE-284

V. Comments for CVE-2026-53520

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