CVE-2026-21851: Project-Monai Monai

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

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 products

• Project-Monai Monai: up to and including 1.5.1

Published 2026-01-07. Last modified 2026-06-17.