CVE-2026-21851 | THREATINT

Description

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 Reserved 2026-01-05 | Published 2026-01-07 | Updated 2026-01-08 | Assigner GitHub_M

MEDIUM: 5.3CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Problem types

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Product status

<= 1.5.1

affected

References

github.com/.../MONAI/security/advisories/GHSA-9rg3-9pvr-6p27 exploit

github.com/.../MONAI/security/advisories/GHSA-9rg3-9pvr-6p27

github.com/...ommit/4014c8475626f20f158921ae0cf98ed259ae4d59

cve.org (CVE-2026-21851)

nvd.nist.gov (CVE-2026-21851)

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