Vulnerability · Published Apr 7, 2026 · Assigned by GitHub_M
CVE-2026-35517Pi-hole FTL affected by Remote Code Execution (RCE) via dns.upstreams Newline Injection
High 8.8
In plain English
A high-severity OS command injection in FTL from pi-hole. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official 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.
Affected products (as reported)
Weakness: CWE-78, CWE-93 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/pi-hole/FTL/security/advisories/GHSA-23w8-7333-p9fj x_refsource_CONFIRM