CVE-2026-35520 | THREATINT

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.

PUBLISHED Reserved 2026-04-03 | Published 2026-04-07 | Updated 2026-04-09 | Assigner GitHub_M

HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem types

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

CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')

Product status

>= 6.0, < 6.6

affected

References

github.com/...le/FTL/security/advisories/GHSA-fqv2-qhfh-ghcj exploit

github.com/...le/FTL/security/advisories/GHSA-fqv2-qhfh-ghcj

cve.org (CVE-2026-35520)

nvd.nist.gov (CVE-2026-35520)

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