CVE•Published 2026-04-07•Modified 2026-04-28•1 article on news•6 live references•NVD data

CVE-2026-35520Pi-hole · Ftldns

Vulnerability data via NVD (ingested)

CVSS v3.1

8.8

HIGH

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

EPSS percentile

Exploit Prediction Scoring System · top 55% of all CVEs

Weaknesses (CWE)

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')

Description

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.

Timeline

Published 2026-04-07

Modified 2026-04-28

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-35520

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Pi-hole Ftldns"

All exposed Pi-hole Ftldns instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Ftldns"

HTTP body or banner mentions "Ftldns" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-35520