CVE-2026-35491: Pi-hole Ftldns

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

FTLDNS (pihole-FTL) provides an interactive API and also generates statistics for Pi-hole's Web interface. From 6.0 to before 6.6, Pi-hole FTL supports a CLI password feature (webserver.api.cli_pw) that creates “CLI” API sessions intended to be read-only for configuration changes. While /api/config correctly blocks CLI sessions from mutating configuration, /api/teleporter allowed Teleporter imports for CLI sessions, enabling a CLI-scoped session to overwrite configuration via a Teleporter archive (authorization bypass). This vulnerability is fixed in 6.6.

Affected products

• Pi-hole Ftldns: from 6.0, before 6.6 (fixed in 6.6)

Published 2026-04-07. Last modified 2026-06-17.