CVE-2026-21851

Published: Jan 7, 2026Modified: Jun 17, 2026

5.3

Vector

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

Exploitability: 1.6 / Impact: 3.6

Source: security-advisories@github.com (Secondary)

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.

Affected (1)

Products: Project Monai: Monai

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Project Monai Monai	Up to 1.5.1

Related CWEs

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (3)

https://github.com/Project-MONAI/MONAI/commit/4014c8475626f20f158921ae0cf98ed259ae4d59

Source: security-advisories@github.com

Patch

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

Source: security-advisories@github.com

ExploitMitigationVendor Advisory

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

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

ExploitMitigationVendor Advisory

Timeline

No history available yet.