CVE-2026-21851
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability—
ProductMonai
PublishedJan 7, 2026
First seenJan 7, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- monai1.5.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| project-monai monai | v ≤ 1.5.1 | — |
| monaiPyPI | v < 1.5.2 | 1.5.2 |
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