VulnerabilityAnalyzed

CVE-2026-33727

Version 6.4 has a local privilege-escalation vulnerability allows code execution as root from the low-privilege pihole account.

MEDIUM 6.7EPSS 0.22%

Does this matter?

Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1: 6.7 MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.22% probability · 12th percentile
CISA KEV: Not listed
Weakness: CWE-269
Affected: pi-hole/pi-hole
Source: security-advisories@github.com

References

https://github.com/pi-hole/pi-hole/security/advisories/GHSA-c935-8g63-qp74Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.