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

CVSS 9.1 · Critical EPSS 0.38% · P30

Possible ATT&CK Techniques 1AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProductVersion RangeStatus
nezhahqnezha< 2.0.13affected
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
nezhahqnezha < 2.0.13 -

II. Public POCs for CVE-2026-53519

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 8426 chars
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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-2026-467169.9 CRITICALNezha Monitoring: RoleMember can run shell on every server (cross-tenant RCE) via POST /ap
CVE-2026-467177.7 HIGHNezha Monitoring: RoleMember-reachable SSRF with full response-body reflection via POST /a
CVE-2026-471207.1 HIGHNezha Monitoring: RoleMember can fire other users' cron tasks via AlertRule.FailTriggerTas
CVE-2026-481197.1 HIGHNezha Monitoring: Authenticated agents can forge service-monitor results for other users'
CVE-2026-493967.1 HIGHNezha Monitoring: Cross-site GET request can trigger stored cron commands on a victim's ag
CVE-2026-535236.8 MEDIUMNezha Monitoring: OAuth2 Redirect URL — Host Header Injection
CVE-2026-535206.5 MEDIUMNezha Monitoring: Authenticated users can claim the dashboard Host through NAT and preempt
CVE-2026-535226.5 MEDIUMNezha Monitoring: Unbounded WebSocket Streams — Resource Exhaustion DoS
CVE-2026-471246.5 MEDIUMNezha WebSocket server stream discloses cross-tenant server telemetry to authenticated mem
CVE-2026-535216.4 MEDIUMNezha Monitoring: Stored future DDNS profile ID allows unauthorized use of another user's
CVE-2026-472686.4 MEDIUMNezha Monitoring: Authenticated DDNS webhook configuration allows blind SSRF from the dash
CVE-2026-493975.3 MEDIUMNezha 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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