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TI-2026-17553 Aliases CVE-2026-21851GHSA-9rg3-9pvr-6p27

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

Priority MEDIUM 57CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00357 29th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed monai (PyPI): 1.5.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Project-MONAIMONAIup to 1.5.1—No fix listedCNA
—monai (PyPI)before 1.5.21.5.2Patch availableGHSA-9rg3-9pvr-6p27
  • MONAI VendorProject-MONAI Affected up to 1.5.1 Fixed in — No fix listed CNA
  • monai (PyPI) Vendor— Affected before 1.5.2 Fixed in 1.5.2 Patch available GHSA-9rg3-9pvr-6p27

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:project-monai:monai:*:*:*:*:*:*:*:*up to 1.5.1VulnerableProject-MONAI
  • cpe:2.3:a:project-monai:monai:*:*:*:*:*:*:*:* Versions up to 1.5.1 Vulnerable ·Project-MONAI

Remediation

  • Fix · GHSA-9rg3-9pvr-6p27 monai (PyPI) Fixed in 1.5.2 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-21851
  2. 2026-10-03 Alias added: GHSA-9rg3-9pvr-6p27

References

Exploit 1

Patch 1

Advisory 1

Other 1

  • TI-2026-64984 MONAI before 1.5.2 Remote Code Execution via Pickle Deserialization CVSS 4.0HIGH 8.8
  • TI-2026-64983 MONAI before 1.6.0 Remote Code Execution via NumpyReader CVSS 4.0HIGH 8.5
  • TI-2026-64982 MONAI before 1.6.0 OS Command Injection via dataset_name_or_id CVSS 4.0HIGH 8.6
  • TI-2026-64981 MONAI before 1.6.0 Remote Code Execution via algo_from_pickle CVSS 4.0HIGH 8.5
  • TI-2026-64978 MONAI through 1.6.0 Remote Code Execution via bundle configuration CVSS 4.0HIGH 8.5
  • TI-2026-64980 MONAI through 1.6.0 _get_fake_spatial_shape eval() Sandbox Bypass via Attribute Chains CVSS 4.0HIGH 7.3
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences