CVE-2026-35520: FTLDNS (pihole-FTL) provides an interactive API and also generates statistics for Pi-hole's Web interface. From 6.0 to…
CVE-2026-35520 · Severity: high · CVSS 8.8 · Published 2026-04-07
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.
No. Junglewise Threat Intelligence has no report of CVE-2026-35520 being exploited in the wild.
How severe is CVE-2026-35520?
High severity, with a CVSS score of 8.8, published 7 April 2026.
Which products and versions are affected?
Pi-hole Ftldns. The advisory does not name versions.
Is there a fix for CVE-2026-35520?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-35520?
Check whether you run Pi-hole Ftldns. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.