---
id: CVE-2026-41448
title: AdGuard Home Authentication Bypass via Path Traversal in Admin-Token Cookie
summary: >-
  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,
  exploiti…
severity: critical
cvss: 9.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L'
cvssSource: cna
cwe:
  - CWE-22
vendor: AdguardTeam
product: AdGuardHome
affected:
  - AdGuardHome < 0.107.77
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-06-08T17:55:04.514029Z'
published: '2026-06-08'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T14:03:00.557Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-41448'
references:
  - url: 'https://github.com/AdguardTeam/AdGuardHome/releases/tag/v0.107.77'
    label: AdGuardHome 0.107.77 Release Notes
  - url: >-
      https://www.vulncheck.com/advisories/adguard-home-authentication-bypass-via-path-traversal-in-admin-token-cookie
tags:
  - cve.org
epss: 0.00542
epssPercentile: 0.45816
ingestedAt: '2026-11-08T14:51:22.440Z'
---

## Overview

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.

## Affected

- `AdGuardHome < 0.107.77`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.