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CVE-2026-41448— AdGuard Home Authentication Bypass via Path Traversal in Admin-Token Cookie

Quick assessment

Affected
AdguardTeam AdGuardHome
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.

AdGuardHome是AdguardTeam的阻止 DNS 服务器的全网广告和跟踪器。 AdGuardHome存在路径遍历漏洞，该漏洞源于认证绕过，可能导致未经身份验证的攻击者通过在Admin-Token cookie中提供路径遍历序列获得完全管理员访问权限。

CVSS 9.4 · Critical EPSS 0.84% · P57

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
AdguardTeam AdGuardHome < 0.107.77 affected
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I. Basic Information for CVE-2026-41448

Vulnerability Information
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Vulnerability Title
AdGuard Home Authentication Bypass via Path Traversal in Admin-Token Cookie
Source: CVE Program / CVE List V5
Vulnerability 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.
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:L
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
AdGuardHome 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
AdGuardHome是AdguardTeam的阻止 DNS 服务器的全网广告和跟踪器。 AdGuardHome存在路径遍历漏洞，该漏洞源于认证绕过，可能导致未经身份验证的攻击者通过在Admin-Token cookie中提供路径遍历序列获得完全管理员访问权限。
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
AdguardTeam AdGuardHome 0 ~ 0.107.77 -

II. Public POCs for CVE-2026-41448

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 12680 chars
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III. Intelligence Information for CVE-2026-41448

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Vendor Advisories for CVE-2026-41448 (1)

Vendor Pages for CVE-2026-41448 (1)

IV. Related Vulnerabilities

Same product: AdGuardHome
Same vendor: AdguardTeam
Same weakness: CWE-22

V. Comments for CVE-2026-41448

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