SB20260408106 - Improper access control in Pi-hole
Published: April 8, 2026
Security Bulletin ID
SB20260408106
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper access control (CVE-ID: CVE-2026-33727)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: 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/E:U/U:Clear
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.
Remediation
Install update from vendor's website.