What’s Vulnerable › Vulnerabilities

CVE-2026-21851: MONAI has Path Traversal (Zip Slip) in NGC Private Bundle Download

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-07 · updated 2026-06-17
• Weakness: CWE-22

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 products

• Project-MONAI MONAI: through 1.5.1

References

• https://github.com/Project-MONAI/MONAI/commit/4014c8475626f20f158921ae0cf98ed259ae4d59
• https://github.com/Project-MONAI/MONAI/security/advisories/GHSA-9rg3-9pvr-6p27
• https://github.com/Project-MONAI/MONAI/security/advisories/GHSA-9rg3-9pvr-6p27

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