CVE-2026-33404

Pi-hole has a Stored XSS / HTML injection in the Network page/Dashboard

State: Published
Severity: 3.4 Low
Published: Apr 6, 2026
Updated: Apr 6, 2026
Reserved: Mar 19, 2026

Description

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, client hostnames and IP addresses from the FTL database are rendered into the DOM without escaping in network.js (Network page) and charts.js/index.js (Dashboard chart tooltips). While upstream validation in dnsmasq and FTL blocks HTML characters via normal DHCP/DNS paths, the web UI performs no output escaping — an inconsistency with other fields in the same file that are properly escaped. This vulnerability is fixed in 6.5.

Scores

CVSS	Score	Vector	Source
3.1	3.4 Low	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
webpi-hole	>= 6.0, < 6.5Affected

References

https://github.com/pi-hole/web/security/advisories/GHSA-px6w-85wp-ww9v

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