CVE-2026-35517

HIGH

Pi-hole FTL affected by Remote Code Execution (RCE) via dns.upstreams Newline Injection

Title source: cna

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-35517. PoCs published by keraattin.

AI-analyzed exploit summary This repository contains a Python script that detects Pi-hole instances vulnerable to CVE-2026-35517, a newline injection flaw in FTLDNS (CWE-93) leading to RCE. The script checks for vulnerable versions (6.0-6.5) but does not include exploit code.

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 upstream DNS servers configuration parameter (dns.upstreams). 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.

Exploits (1)

nomisec SCANNER

by keraattin · poc

https://github.com/keraattin/CVE-2026-35517

View Code ZIP pw:eip

This repository contains a Python script that detects Pi-hole instances vulnerable to CVE-2026-35517, a newline injection flaw in FTLDNS (CWE-93) leading to RCE. The script checks for vulnerable versions (6.0-6.5) but does not include exploit code.

Classification

Scanner 95%

Attack Type

Rce

Complexity

Moderate

Reliability

Reliable

Target: Pi-hole FTLDNS 6.0 to 6.5

Auth required

Prerequisites: Network access to Pi-hole admin interface · Valid credentials for API access

MITRE ATT&CK

T1190 - Exploit Public-Facing Application T1059 - Command and Scripting Interpreter T1203 - Exploitation for Client Execution

devstral-2 · analyzed Apr 14, 2026 Full analysis →

References (1)

Core 1

Core References

X_Refsource_Confirm x_refsource_confirm

https://github.com/pi-hole/FTL/security/advisories/GHSA-23w8-7333-p9fj

Scores

CVSS v3 8.8

EPSS 0.0086

EPSS Percentile 53.5%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact total

Details

CWE

CWE-78 CWE-93

Status published

Products (2)

pi-hole/FTL >= 6.0, < 6.6

pi-hole/ftldns 6.0 - 6.5

Published Apr 07, 2026

Tracked Since Apr 07, 2026