CVE-2026-119336

HIGH 7.8

Pi-hole: arbitrary root file clobber / chmod / disclosure via updatecheck.sh cron following /etc/pihole/versions symlink

CVSS Score

7.8

EPSS Score

0.0%

EPSS Percentile

0th

Pi-hole is a DNS sinkhole that protects devices from unwanted content without installing any client-side software. From 6.4.2 until 6.5, the root-run advanced/Scripts/updatecheck.sh cron job applies truncate -s 0 and chmod 644 to /etc/pihole/versions while following symbolic links in a directory owned by the pihole user. An attacker executing as pihole can replace that path with a symlink so the scheduled root operations truncate or create an arbitrary root-owned file, or race the operations so chmod makes a sensitive target world-readable without truncating it. This issue is fixed in version 6.5.

CWE	CWE-59 CWE-61
Vendor	pi-hole
Product	pi-hole
Published	Oct 30, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

pi-hole / pi-hole

>= 6.4.2, < 6.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/pi-hole/pi-hole/security/advisories/GHSA-xch2-4qxw-g5vj github.com: https://github.com/pi-hole/pi-hole/pull/6719 github.com: https://github.com/pi-hole/pi-hole/commit/85de82dd2b63bf71ecb936177dfb82421d9d2f25 github.com: https://github.com/pi-hole/pi-hole/commit/c1062f43b0de1876321bafac58fba862406366cb github.com: https://github.com/pi-hole/pi-hole/commit/e05dc3f139206fd8d0e4a052dceefb9056533517 github.com: https://github.com/pi-hole/pi-hole/releases/tag/v6.5