Vulnerability in Pi-Hole
CVE-2026-119336
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Pi-Hole — versions >= 6.4.2, < 6.5
Weakness classification (CWE)
References
- github.com/pi-hole/pi-hole/commit/85de82dd2b63bf71ecb936177dfb82421d9d2f25
- github.com/pi-hole/pi-hole/commit/c1062f43b0de1876321bafac58fba862406366cb
- github.com/pi-hole/pi-hole/commit/e05dc3f139206fd8d0e4a052dceefb9056533517
- github.com/pi-hole/pi-hole/pull/6719
- github.com/pi-hole/pi-hole/releases/tag/v6.5
- github.com/pi-hole/pi-hole/security/advisories/GHSA-xch2-4qxw-g5vj
Frequently asked questions
- What is CVE-2026-119336?
- CVE-2026-119336 is a high-severity vulnerability in Pi-Hole, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2026-10-30.
- How severe is CVE-2026-119336?
- High severity. CVSS v3 base score is 7.8 out of 10.