CVE-2026-21851

MONAI has Path Traversal (Zip Slip) in NGC Private Bundle Download

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

Project-MONAI · MONAI

CVSS v3.1 GITHUB

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

EPSS

0.36% chance of exploitation in the next 30 days, 28th percentile

Published

2026-01-07

Updated

2026-01-08

Proof-of-concept exploits (1)

• advisories/GHSA-9rg3-9pvr-6p27

Security advisories

• Project-MONAI/MONAI/security/advisories/GHSA-9rg3-9pvr-6p27
• Project-MONAI/MONAI/commit/4014c8475626f20f158921ae0cf98ed259ae4d59

References

• CVE Record
• NVD entry