Pi-hole up to 6.4 PID File Validation utils.sh getFTLPID privileges management

Summaryinfo

A vulnerability classified as very critical was found in Pi-hole up to 6.4. This vulnerability affects the function getFTLPID of the file advanced/Scripts/utils.sh of the component PID File Validation. The manipulation results in privileges management. This vulnerability is identified as CVE-2026-119335. The attack is only possible with local access. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Pi-hole up to 6.4. Affected is the function getFTLPID of the file advanced/Scripts/utils.sh of the component PID File Validation. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Pi-hole is a DNS sinkhole that protects devices from unwanted content without installing any client-side software. Prior to 6.5, advanced/Scripts/utils.sh getFTLPID() attempts to validate the pihole-owned /run/pihole-FTL.pid file with expr "${FTL_PID}" : "[^[:digit:]]", but this rejects only values whose first character is not a digit. An attacker with code execution as the pihole user can write a digit-prefixed arithmetic expression to the pihole-owned PID file. Root-run pihole subcommands then evaluate [[ "$pid" -eq "-1" ]], causing Bash to recursively evaluate array subscripts and execute command substitution as root. This bypasses the content-validation portion of the CVE-2026-41489 remediation while leaving its hardcoded PID-file path protection intact. This issue is fixed in version 6.5.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-119335 since 10/29/2026. The exploitability is told to be easy. Local access is required to approach this attack. The exploitation needs additional levels of successful authentication. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/30/2026). This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 6.5 eliminates this vulnerability.

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Productinfo

Name

• Pi-hole

Version

• 6.0
• 6.1
• 6.2
• 6.3
• 6.4

Website

• Product: https://github.com/pi-hole/pi-hole/

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