{"id":"CVE-2026-21851","aliases":["GHSA-9rg3-9pvr-6p27","PYSEC-2026-1678"],"url":"https://o3.security/vulnerability/CVE-2026-21851","summary":"MONAI has Path Traversal (Zip Slip) in NGC Private Bundle Download","details":"MONAI (Medical Open Network for AI) is an AI toolkit for health care imaging. In versions up to and including 1.5.1, a Path Traversal (Zip Slip) vulnerability exists in MONAI's `_download_from_ngc_private()` function. The function uses `zipfile.ZipFile.extractall()` without path validation, while other similar download functions in the same codebase properly use the existing `safe_extract_member()` function. Commit 4014c8475626f20f158921ae0cf98ed259ae4d59 fixes this issue.","published":"2026-01-07T22:27:19.410Z","modified":"2026-07-15T01:48:53.224571281Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"monai","fixedVersion":"1.5.2"}],"fix":{"url":"https://github.com/Project-MONAI/MONAI/commit/4014c8475626f20f158921ae0cf98ed259ae4d59","label":"Project-MONAI/MONAI@4014c84"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21851.json"},{"type":"ADVISORY","url":"https://github.com/Project-MONAI/MONAI/security/advisories/GHSA-9rg3-9pvr-6p27"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21851"},{"type":"FIX","url":"https://github.com/Project-MONAI/MONAI/commit/4014c8475626f20f158921ae0cf98ed259ae4d59"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:48:53.224571281Z"}}