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CVE

CVE-2026-41448

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

CVE-2026-41448

AdGuard Home Authentication Bypass via Path Traversal in Admin-Token Cookie

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.2
-
4.0
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/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
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/AdguardTeam/AdGuardHome/releases/tag/v0.107.77, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41448.json, https://nvd.nist.gov/vuln/detail/CVE-2026-41448, https://www.vulncheck.com/advisories/adguard-home-authentication-bypass-via-path-traversal-in-admin-token-cookie, https://github.com/AdguardTeam/AdGuardHome

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.00542%
EPSS Percentile
0.43342%
Introduced Version
0
Fix Available
09789cd5d2d68563143a3a66160dc3ecb3cfba40

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