TI-2026-64980 Aliases CVE-2026-100842 GHSA-j335-cfj5-2fw8

MONAI through 1.6.0 _get_fake_spatial_shape eval() Sandbox Bypass via Attribute Chains

HIGH 67CWE-95Published 2026-09-27 · Updated 2026-09-30

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: High
Attack requirements: Present
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-95.

Summary

MONAI through 1.6.0 contains an eval injection vulnerability in _get_fake_spatial_shape() in monai/bundle/scripts.py. The function validates shape expressions with a helper that walks the AST and only collects ast.Name nodes, rejecting any name other than 'p' or 'n', before passing the string to eval(). Expressions built solely from constants and attribute, subscript, or call nodes (for example "(1).__class__.__bases__[0].__subclasses__()" or "int.__class__.__init__.__globals__") contain no ast.Name nodes and therefore bypass the allowlist. Because the shape value originates from bundle metadata consumed by _get_real_input_data and verify_net_in_out (reachable through the bundle 'verify_net_in_out' CLI flow), an attacker who can influence a bundle's metadata can escape the eval sandbox via object introspection chains and achieve code execution in this non-default flow.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00183 7th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Project-MONAI	MONAI	up to 1.6.0	—	No fix listed	CNA

MONAI VendorProject-MONAI Affected up to 1.6.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:project-monai:monai::::::::	up to 1.6.0	Vulnerable	Project-MONAI

cpe:2.3:a:project-monai:monai:*:*:*:*:*:*:*:* Versions up to 1.6.0 Vulnerable ·Project-MONAI

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-100842
2026-10-03 Alias added: GHSA-j335-cfj5-2fw8

References

Exploit 1

GitHub Security Advisory (GHSA-h89g-r5pc-wxfm)

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-2026-17553 MONAI has Path Traversal (Zip Slip) in NGC Private Bundle Download CVSS 3.1MEDIUM 5.3

See all 7 →

Sources

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