CVE-2026-33727: Pi-Hole

Medium severity, CVSS 6.7. EPSS: 0.2% chance of exploitation in the next 30 days.

Pi-hole is a Linux network-level advertisement and Internet tracker blocking application. Version 6.4 has a local privilege-escalation vulnerability allows code execution as root from the low-privilege pihole account. Important context: the pihole account uses nologin, so this is not a direct interactive-login issue. However, nologin does not prevent code from running as UID pihole if a Pi-hole component is compromised. In that realistic post-compromise scenario, attacker-controlled content in /etc/pihole/versions is sourced by root-run Pi-hole scripts, leading to root code execution. This vulnerability is fixed in 6.4.1.

Affected products

• Pi-hole Pi-Hole: version 6.4 only

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