{"id":"CVE-2026-35353","aliases":["GHSA-mj6p-44ch-cq69"],"url":"https://o3.security/vulnerability/CVE-2026-35353","summary":"uutils coreutils mkdir Permission Exposure Race Condition with -m","details":"The mkdir utility in uutils coreutils incorrectly applies permissions when using the -m flag by creating a directory with umask-derived permissions (typically 0755) before subsequently changing them to the requested mode via a separate chmod system call. In multi-user environments, this introduces a brief window where a directory intended to be private is accessible to other users, potentially leading to unauthorized data access.\n\n---\n_Zellic finding 3.48. Reported in the Zellic *uutils coreutils Program Security Assessment* (for Canonical, Jan 2026), audited commit `3a07ffc5a9bd4c283e75afa548ba1f1957bad242`._","published":"2026-04-22T16:08:09.923Z","modified":"2026-08-12T03:51:33.477148187Z","cvss":{"score":3.3,"severity":"LOW","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"epss":{"score":0.00102,"percentile":0.01062,"asOf":"2026-09-14"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"uu_mkdir","fixedVersion":"0.6.0"}],"fix":{"url":"https://github.com/uutils/coreutils/pull/10036","label":"uutils/coreutils#10036"},"references":[{"type":"WEB","url":"https://github.com/uutils"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35353.json"},{"type":"ADVISORY","url":"https://github.com/uutils/coreutils/releases/tag/0.6.0"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35353"},{"type":"FIX","url":"https://github.com/uutils/coreutils/pull/10036"},{"type":"PACKAGE","url":"https://github.com/uutils/coreutils"},{"type":"WEB","url":"https://github.com/uutils/coreutils/security/advisories/GHSA-mj6p-44ch-cq69"},{"type":"WEB","url":"https://github.com/uutils/coreutils/commit/037b9583bc03d814e8516df54ebcda6f681fe1f8"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:33.477148187Z"}}