CVE-2026-33406
Medium · 5.4CVSS
5.4
EPSS
0.4%
Published
Apr 6, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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Related vulnerabilities
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