What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-07 · updated 2026-10-26
• Weakness: CWE-78

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.

Affected products

• pi-hole FTL: from 6.0 through 6.5

References

• https://github.com/pi-hole/FTL/security/advisories/GHSA-fqv2-qhfh-ghcj
• https://github.com/pi-hole/FTL/security/advisories/GHSA-fqv2-qhfh-ghcj

Get alerted when CVE-2026-35520 or the next vulnerability affects your stack