CVE-2026-33406

Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. From 6.0 to before 6.5, configuration values from the /api/config endpoint are placed directly into HTML value="" attributes without escaping in settings-advanced.js, enabling HTML attribute injection. A double quote in any config value breaks out of the attribute context. JavaScript execution is blocked by the server's CSP (script-src 'self'), but injected attributes can alter element styling for UI redressing. The primary attack vector is importing a malicious teleporter backup, which bypasses per-field server-side validation. This vulnerability is fixed in 6.5.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/pi-hole/web/security/advisories/GHSA-9rfm-c5g6-538p	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:pi-hole:web_interface:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-06 15:17

Updated : 2026-06-17 10:37

NVD link : CVE-2026-33406

Mitre link : CVE-2026-33406

CVE.ORG link : CVE-2026-33406

JSON object : View

Products Affected

pi-hole

web_interface

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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