{"id":"CVE-2017-18869","aliases":["GHSA-c6rq-rjc2-86v2"],"url":"https://o3.security/vulnerability/CVE-2017-18869","summary":"Time-of-check Time-of-use (TOCTOU) Race Condition in chownr","details":"A TOCTOU issue in the chownr package before 1.1.0 for Node.js 10.10 could allow a local attacker to trick it into descending into unintended directories via symlink attacks.","published":"2020-06-15T15:15:09.317Z","modified":"2026-07-08T10:55:22.890568Z","cvss":{"score":2.5,"severity":"LOW","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"},"epss":{"score":0.00336,"percentile":0.26702,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"npm","name":"chownr","fixedVersion":"1.1.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=863985"},{"type":"ADVISORY","url":"https://github.com/isaacs/chownr/issues/14"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1611614"},{"type":"EVIDENCE","url":"https://snyk.io/vuln/npm:chownr:20180731"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T10:55:22.890568Z"}}