SB20260425197 - External Control of System or Configuration Setting in Pi-hole

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Main Vulnerability Database SB20260425197

SB20260425197 - External Control of System or Configuration Setting in Pi-hole

Published: April 25, 2026

Security Bulletin ID SB20260425197
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) External Control of System or Configuration Setting (CVE-ID: CVE-2026-41489)

CWE-ID: CWE-15 - External Control of System or Configuration Setting

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to escalate privileges.

The vulnerability exists due to external control of a configuration setting in root-executed service hook scripts when reading the files.pid path from /etc/pihole/pihole.toml. A local user can write an arbitrary path into the configuration and trigger a service restart to escalate privileges.

The issue can be exploited through the pihole-FTL-prestart.sh and pihole-FTL-poststop.sh hooks, which run as root via systemd and perform privileged file operations on the configured path.


Remediation

Install update from vendor's website.

References