CVE-2026-35520 HIGH

CVE-2026-35520: Pi-hole FTL affected by Remote Code Execution (RCE) via dhcp.leaseTime Newline Injection

Vendor Pi-Hole
Product FTL
Weakness CWE-78
Published April 7, 2026
Last update April 9, 2026
View on NVD All CVEs

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

FTLDNS (pihole-FTL) provides an interactive API and also generates statistics for Pi-hole's Web interface. From 6.0 to before 6.6, the Pi-hole FTL engine contains a Remote Code Execution (RCE) vulnerability in the DHCP lease time configuration parameter (dhcp.leaseTime). This vulnerability allows an authenticated attacker to inject arbitrary dnsmasq configuration directives through newline characters, ultimately achieving command execution on the underlying system. This vulnerability is fixed in 6.6.

Key dates

02Disclosure timeline

April 7, 2026 CVE published
April 9, 2026 Record updated