CVE-2026-33404: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in pi-hole web
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.
AI Analysis
Technical Summary
CVE-2026-33404 is a CWE-79 cross-site scripting vulnerability affecting the Pi-hole Admin Interface web UI versions 6.0 to before 6.5. The vulnerability occurs because client hostnames and IP addresses retrieved from the FTL database are inserted into the DOM without proper escaping in network.js and charts.js/index.js. While upstream validation in dnsmasq and FTL blocks HTML characters through normal DHCP/DNS paths, the web UI lacks consistent output escaping, creating an XSS risk. This inconsistency is addressed in Pi-hole version 6.5.
Potential Impact
The vulnerability allows low-severity cross-site scripting attacks due to improper output escaping of client hostnames and IP addresses in the Pi-hole web interface. Exploitation could lead to limited confidentiality and integrity impacts within the context of the local network-level management interface. The CVSS score is 3.4, indicating a low impact. No known exploits are reported in the wild.
Mitigation Recommendations
This vulnerability is fixed in Pi-hole version 6.5. Users should upgrade to version 6.5 or later to remediate this issue. Since the product is not a cloud service, remediation requires applying the official update. Patch status is confirmed by the vendor advisory indicating the fix in version 6.5.
CVE-2026-33404: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in pi-hole web
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-33404 is a CWE-79 cross-site scripting vulnerability affecting the Pi-hole Admin Interface web UI versions 6.0 to before 6.5. The vulnerability occurs because client hostnames and IP addresses retrieved from the FTL database are inserted into the DOM without proper escaping in network.js and charts.js/index.js. While upstream validation in dnsmasq and FTL blocks HTML characters through normal DHCP/DNS paths, the web UI lacks consistent output escaping, creating an XSS risk. This inconsistency is addressed in Pi-hole version 6.5.
Potential Impact
The vulnerability allows low-severity cross-site scripting attacks due to improper output escaping of client hostnames and IP addresses in the Pi-hole web interface. Exploitation could lead to limited confidentiality and integrity impacts within the context of the local network-level management interface. The CVSS score is 3.4, indicating a low impact. No known exploits are reported in the wild.
Mitigation Recommendations
This vulnerability is fixed in Pi-hole version 6.5. Users should upgrade to version 6.5 or later to remediate this issue. Since the product is not a cloud service, remediation requires applying the official update. Patch status is confirmed by the vendor advisory indicating the fix in version 6.5.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-19T17:02:34.170Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d3ce180a160ebd92c09cce
Added to database: 4/6/2026, 3:15:36 PM
Last enriched: 4/6/2026, 3:31:02 PM
Last updated: 4/6/2026, 11:18:37 PM
Views: 4
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