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

{
    "lastseen": "",
    "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 \u2014 which os.Stat finds and http.ServeFile returns. No authentication required. This issue has been patched in version 2.0.13.",
    "published": "2026-06-12T21:03:48.844Z",
    "modified": "2026-06-12T21:03:48.844Z",
    "type": "cve",
    "title": "Nezha Monitoring: Pre-auth path traversal via /dashboard.. prefix confusion leaks jwt_secret_key",
    "source": "GitHub_M",
    "references": "https://github.com/nezhahq/nezha/security/advisories/GHSA-5c25-7vpj-9mqh",
    "id": "CVE-2026-53519",
    "bulletinFamily": "",
    "cwe": [
        "CWE-22"
    ],
    "cvelist": null,
    "sourceData": "nezhahq nezha < 2.0.13",
    "sourceHref": "",
    "cvss": {
        "score": 9.1,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "nezha",
    "version": "< 2.0.13",
    "vendor": "nezhahq",
    "ai_description": "Pre-auth path traversal via /dashboard.. prefix confusion leaks jwt_secret_key",
    "ai_severity": "Critical",
    "ai_vendor": "nezhahq",
    "ai_product": "Nezha Monitoring",
    "ai_version": "< 2.0.13",
    "ai_score": 9.1
}