Web Interface Vulnerability in Pi-hole Admin Interface by Pi-hole
CVE-2026-33404

3.4LOW

Key Information:

Vendor

Pi-hole

Status
Web
Vendor
CVE Published:
6 April 2026

What is CVE-2026-33404?

The Pi-hole Admin Interface, used for managing the Pi-hole application, has a vulnerability that allows client hostnames and IP addresses from the FTL database to be rendered into the DOM without proper escaping in specific JavaScript files. Although upstream validation in dnsmasq and FTL mitigates the risk by blocking HTML characters through normal DHCP/DNS paths, the absence of output escaping in the web UI creates a potential injection risk. This inconsistency with other safely rendered fields necessitates a security update, which is provided in version 6.5.

Affected Version(s)

web >= 6.0, < 6.5

References

https://github.com/pi-hole/web/security/advisories/GHSA-p...
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CVSS V3.1

Score:
3.4
Severity:
LOW
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.