CVE-2026-41448
AdGuard Home Authentication Bypass via Path Traversal in Admin-Token Cookie
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.
INFO
Published Date :
June 8, 2026, 5:16 p.m.
Last Modified :
July 14, 2026, 9:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Sanitize user input in Admin-Token cookie.
- Validate token file path construction.
- Update AdGuard Home to the latest version.
- Avoid using the --glinet flag if possible.
Public PoC/Exploit Available at Github
CVE-2026-41448 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-41448.
| URL | Resource |
|---|---|
| https://github.com/AdguardTeam/AdGuardHome/releases/tag/v0.107.77 | |
| https://www.vulncheck.com/advisories/adguard-home-authentication-bypass-via-path-traversal-in-admin-token-cookie |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-41448 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-41448
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Public specification and optimization logs of the private AdGuardHome & dnsproxy fork used in dnsdoh.art
adguardhome dns dnsproxy doh doh3 go high-performance lock-free quic zero-allocation dot
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-41448 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-41448 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://github.com/AdguardTeam/AdGuardHome', 'vendor': 'AdguardTeam', 'product': 'AdGuardHome', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.107.77', 'versionType': 'semver'}], 'defaultStatus': 'affected'}] [{'repo': 'https://github.com/AdguardTeam/AdGuardHome', 'vendor': 'AdguardTeam', 'product': 'AdGuardHome', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.107.77', 'versionType': 'semver'}], 'packageURL': 'pkg:github/AdguardTeam/AdGuardHome', 'defaultStatus': 'affected'}] -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/AdguardTeam/AdGuardHome', 'vendor': 'AdguardTeam', 'product': 'AdGuardHome', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.107.77', 'versionType': 'semver'}], 'defaultStatus': 'affected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-41448', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-08T17:55:04.514029Z'} -
New CVE Received by [email protected]
Jun. 08, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L Added CWE CWE-22 Added Reference https://github.com/AdguardTeam/AdGuardHome/releases/tag/v0.107.77 Added Reference https://www.vulncheck.com/advisories/adguard-home-authentication-bypass-via-path-traversal-in-admin-token-cookie