CVE-2026-33727

Pi-hole has a Local Privilege Escalation (post-compromise, pihole -> root).

State: Published
Severity: 6.4 Medium
Published: Apr 6, 2026
Updated: Apr 7, 2026
Reserved: Mar 23, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	6.4 Medium	CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-269 Improper Privilege Management

Affected Products

Product	Versions
pi-holepi-hole	>= 6.4, < 6.4.1Affected

References

https://github.com/pi-hole/pi-hole/security/advisories/GHSA-c935-8g63-qp74

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