Vulnerability · Published Apr 6, 2026 · Assigned by GitHub_M
CVE-2026-33404Pi-hole has a Stored XSS / HTML injection in the Network page/Dashboard
Low 3.4
In plain English
A low-severity cross-site scripting in web from pi-hole. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).
Official 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.
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
References
- https://github.com/pi-hole/web/security/advisories/GHSA-px6w-85wp-ww9v x_refsource_CONFIRM