AdGuard Home Authentication Bypass via Path Traversal in Admin-Token Cookie_CVE-2026-41448

{
    "lastseen": "",
    "description": "AdGuard Home, when started with the --glinet flag, contains an authentication bypass vulnerability that allows unauthenticated attackers to gain full admin access by supplying a path traversal sequence in the Admin-Token cookie, exploiting unsanitized string concatenation in the token file path construction within the authglinet middleware. Attackers can craft a request with a traversal payload in the Admin-Token header to redirect file reads to arbitrary paths.",
    "published": "2026-06-08T16:12:56.518Z",
    "modified": "2026-06-08T16:12:56.518Z",
    "type": "cve",
    "title": "AdGuard Home Authentication Bypass via Path Traversal in Admin-Token Cookie",
    "source": "VulnCheck",
    "references": "https://github.com/AdguardTeam/AdGuardHome/releases/tag/v0.107.77\nhttps://www.vulncheck.com/advisories/adguard-home-authentication-bypass-via-path-traversal-in-admin-token-cookie",
    "id": "CVE-2026-41448",
    "bulletinFamily": "",
    "cwe": [
        "CWE-22"
    ],
    "cvelist": null,
    "sourceData": "AdguardTeam AdGuardHome 0",
    "sourceHref": "",
    "cvss": {
        "score": 9.2,
        "severity": "CRITICAL",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "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": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "AdGuardHome",
    "version": "0",
    "vendor": "AdguardTeam",
    "ai_description": "Authentication bypass via path traversal in Admin-Token cookie",
    "ai_severity": "Critical",
    "ai_vendor": "AdguardTeam",
    "ai_product": "AdGuardHome",
    "ai_version": "0.107.77",
    "ai_score": 9.2
}