CVE-2026-35521

high

Published 2026-04-07 · Modified 2026-04-28

CVSS v3

8.8

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

CVSS v2

—

VIR risk

8.8

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 hosts configuration parameter (dhcp.hosts). 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.

Predictions

Exploit likelihood

92%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: security-advisories@github.com — https://github.com/pi-hole/FTL/security/advisories/GHSA-vfmq-jrx3-wv3c

Application impact

Vendor	Product	Versions	Fixed
pi-hole	ftldns	`{"startIncluding":"6.0","endIncluding":"6.5"}`

References

https://github.com/pi-hole/FTL/security/advisories/GHSA-vfmq-jrx3-wv3c

CWEs

CWE-78 CWE-93

Verify integrity in audit chain (admin only). AS-IS.