Improper access control in Pi-hole - CVE-2026-33727
Published: April 8, 2026
Vulnerability identifier: #VU125386
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-33727
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to escalate privileges.
The vulnerability exists due to improper access control in root-run Pi-hole scripts when sourcing /etc/pihole/versions. A local privileged user can modify the writable file to escalate privileges.
Exploitation requires prior code execution as the pihole account and a system where root executes Pi-hole scripts, such as via cron or administrative use.
Affected software
Pi-hole
How to mitigate CVE-2026-33727
Install security update from vendor's website.
Pi-hole - update to 6.4.1