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CVE-2026-53519— Nezha Monitoring: Pre-auth path traversal via /dashboard.. prefix confusion leaks jwt_secret_key

Quick assessment

Affected
nezhahq nezha
Exploitation
Public or AI PoC available; prioritize validation
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 2.0.13之前版本存在安全漏洞，该漏洞源于dashboard的NoRoute处理器中fallbackToFrontend函数使用strings.HasPrefix而非路径段匹配来验证URL，允许攻击者通过构造如/dashboard../data/config.yaml的输入绕过检查，导致任意文件读取。

CVSS 9.1 · Critical EPSS 1.93% · P78

Public Exploits 1

Nuclei · 1 CVE-2026-53519.yaml [template]

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
nezhahq nezha < 2.0.13 affected
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I. Basic Information for CVE-2026-53519

Vulnerability Information
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Vulnerability Title
Nezha Monitoring: Pre-auth path traversal via /dashboard.. prefix confusion leaks jwt_secret_key
Source: CVE Program / CVE List V5
Vulnerability Description
Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. Prior to version 2.0.13, fallbackToFrontend in the dashboard's NoRoute handler treats any URL whose raw string starts with /dashboard as an admin-frontend asset request. The check uses strings.HasPrefix, not a path-segment match, so the input /dashboard../data/config.yaml is accepted; strings.TrimPrefix leaves ../data/config.yaml; and path.Join("admin-dist", "../data/config.yaml") normalizes to data/config.yaml — which os.Stat finds and http.ServeFile returns. No authentication required. This issue has been patched in version 2.0.13.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Nezha Monitoring 路径遍历漏洞
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 2.0.13之前版本存在安全漏洞，该漏洞源于dashboard的NoRoute处理器中fallbackToFrontend函数使用strings.HasPrefix而非路径段匹配来验证URL，允许攻击者通过构造如/dashboard../data/config.yaml的输入绕过检查，导致任意文件读取。
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 < 2.0.13 -

II. Public POCs for CVE-2026-53519

# POC Description Source Link Shenlong Link
1 Nezha Monitoring < 2.0.13 contains a path traversal caused by improper prefix checking in the dashboard's NoRoute handler, letting unauthenticated attackers read arbitrary files via crafted URLs. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-53519.yaml POC Details
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III. Intelligence Information for CVE-2026-53519

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Vendor Advisories for CVE-2026-53519 (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-2026-46717 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-2026-53520 6.5 MEDIUM Nezha Monitoring: Authenticated users can claim the dashboard Host through NAT and preempt
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-22

V. Comments for CVE-2026-53519

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