Vulnerability Description
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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/pi-hole/pi-hole/commit/85de82dd2b63bf71ecb936177dfb82421d9d2f
- https://github.com/pi-hole/pi-hole/commit/c1062f43b0de1876321bafac58fba862406366
- https://github.com/pi-hole/pi-hole/commit/e05dc3f139206fd8d0e4a052dceefb90565335
- https://github.com/pi-hole/pi-hole/pull/6719
- https://github.com/pi-hole/pi-hole/releases/tag/v6.5
- https://github.com/pi-hole/pi-hole/security/advisories/GHSA-xch2-4qxw-g5vj
FAQ
What is CVE-2026-119336?
CVE-2026-119336 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 t...
How severe is CVE-2026-119336?
CVE-2026-119336 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-119336?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.