CVE-2026-41448 AdGuard Home Authentication Bypass via Path Traversal in Admin-Token Cookie
Unauthenticated attackers can gain full admin access via path traversal in the Admin-Token cookie when the --glinet flag is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-41448?
CVE-2026-41448 is a critical authentication bypass vulnerability in AdguardTeam AdGuardHome, published on 8 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2026-41448?
How do I fix CVE-2026-41448?
No fix has been published for CVE-2026-41448 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-41448 being exploited?
There is no known exploitation of CVE-2026-41448 in the wild and no public exploit code.
Sources
Also known as GHSA-599m-gqxc-4x5m.