{"id":"CVE-2026-119336","published":"2026-10-30T20:17:08.297","lastModified":"2026-10-30T23:17:09.687","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.","cvssScore":7.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-59","CWE-61"],"vendors":[],"products":[],"references":[{"url":"https://github.com/pi-hole/pi-hole/commit/85de82dd2b63bf71ecb936177dfb82421d9d2f25","tags":[]},{"url":"https://github.com/pi-hole/pi-hole/commit/c1062f43b0de1876321bafac58fba862406366cb","tags":[]},{"url":"https://github.com/pi-hole/pi-hole/commit/e05dc3f139206fd8d0e4a052dceefb9056533517","tags":[]},{"url":"https://github.com/pi-hole/pi-hole/pull/6719","tags":[]},{"url":"https://github.com/pi-hole/pi-hole/releases/tag/v6.5","tags":[]},{"url":"https://github.com/pi-hole/pi-hole/security/advisories/GHSA-xch2-4qxw-g5vj","tags":[]}],"exploitRefs":[{"url":"https://github.com/pi-hole/pi-hole/commit/85de82dd2b63bf71ecb936177dfb82421d9d2f25","tags":[]},{"url":"https://github.com/pi-hole/pi-hole/commit/c1062f43b0de1876321bafac58fba862406366cb","tags":[]},{"url":"https://github.com/pi-hole/pi-hole/commit/e05dc3f139206fd8d0e4a052dceefb9056533517","tags":[]},{"url":"https://github.com/pi-hole/pi-hole/pull/6719","tags":[]},{"url":"https://github.com/pi-hole/pi-hole/releases/tag/v6.5","tags":[]},{"url":"https://github.com/pi-hole/pi-hole/security/advisories/GHSA-xch2-4qxw-g5vj","tags":[]}],"hasPoc":true,"ai":null}