{"id":"CVE-2026-119336","aliases":[],"cve":{"records":[{"id":"CVE-2026-119336","source":"GitHub_M","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-29T20:44:30.286Z","published":"2026-10-30T20:05:40.100Z","modified":"2026-10-30T22:14:23.468Z"}],"publishers":[{"name":"GitHub_M","role":"CNA","organizationId":"a0819718-46f1-4df5-94e2-005712e83aaa","modified":"2026-10-30T20:05:40.100Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-30T22:14:23.468Z"}],"references":[{"url":"https://github.com/pi-hole/pi-hole/security/advisories/GHSA-xch2-4qxw-g5vj","tags":["x_refsource_CONFIRM"],"source":"GitHub_M"},{"url":"https://github.com/pi-hole/pi-hole/pull/6719","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/pi-hole/pi-hole/commit/85de82dd2b63bf71ecb936177dfb82421d9d2f25","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/pi-hole/pi-hole/commit/c1062f43b0de1876321bafac58fba862406366cb","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/pi-hole/pi-hole/commit/e05dc3f139206fd8d0e4a052dceefb9056533517","tags":["x_refsource_MISC"],"source":"GitHub_M"},{"url":"https://github.com/pi-hole/pi-hole/releases/tag/v6.5","tags":["x_refsource_MISC"],"source":"GitHub_M"}],"weaknesses":[{"id":"CWE-59","description":"CWE-59: Improper Link Resolution Before File Access ('Link Following')","source":"GitHub_M"},{"id":"CWE-61","description":"CWE-61: UNIX Symbolic Link (Symlink) Following","source":"GitHub_M"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-30T21:21:13.368597Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"title":"Pi-hole: arbitrary root file clobber / chmod / disclosure via updatecheck.sh cron following /etc/pihole/versions symlink","titleSource":"GitHub_M","descriptionSource":"GitHub_M","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.","score":7.8,"severity":"high","published":"2026-10-30T20:05:40.100Z","modified":"2026-10-30T22:14:23.468Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"pi-hole","name":"pi-hole","platforms":[],"versions":[{"version":">= 6.4.2, < 6.5","status":"affected"}],"cpes":[],"source":"GitHub_M","url":"https://www.cve.org/CVERecord?id=CVE-2026-119336"}],"remediation":[],"references":["https://github.com/pi-hole/pi-hole/security/advisories/GHSA-xch2-4qxw-g5vj","https://github.com/pi-hole/pi-hole/pull/6719","https://github.com/pi-hole/pi-hole/commit/85de82dd2b63bf71ecb936177dfb82421d9d2f25","https://github.com/pi-hole/pi-hole/commit/c1062f43b0de1876321bafac58fba862406366cb","https://github.com/pi-hole/pi-hole/commit/e05dc3f139206fd8d0e4a052dceefb9056533517","https://github.com/pi-hole/pi-hole/releases/tag/v6.5"],"sources":[{"name":"CVE","id":"CVE-2026-119336","modified":"2026-10-30T22:14:23.468Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-119336"}],"assessments":[{"source":"GitHub_M","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8}],"sourceAffected":[],"observedAt":"2026-10-30T22:48:18.337Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T09:45:32.074Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-30T20:30:36.923Z","attemptedAt":"2026-10-30T20:30:36.923Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-10-30T20:30:35.470Z","attemptedAt":"2026-10-30T20:30:35.470Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-10-30T20:30:36.925Z","attemptedAt":"2026-10-30T20:30:36.925Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-10-30T20:30:35.583Z","attemptedAt":"2026-10-30T20:30:35.583Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-119336","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119336","modified":"2026-10-30T20:17:08.297","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-10-30T20:30:36.923Z"}],"aiSummary":{"text":"Pi-hole versions 6.4.2 to 6.5 are vulnerable to arbitrary root file modification and disclosure. An attacker with pihole user access can exploit a symlink vulnerability in the updatecheck.sh cron job. This allows modification of root-owned files.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-31T00:16:11.039Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-119336"}]}}