TI-2026-64984 Aliases CVE-2026-100846 GHSA-cvqf-4876-w239

MONAI before 1.5.2 Remote Code Execution via Pickle Deserialization

HIGH 73CWE-502Published 2026-09-27 · Updated 2026-10-08

Key facts

Attack vector: Network
Privileges required: High
User interaction: Passive
Attack complexity: High
Attack requirements: Present
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

MONAI before 1.5.2 contains a deserialization of untrusted data vulnerability in the algo_from_pickle function in monai/auto3dseg/utils.py. The function reads a .pkl file and passes its contents to pickle.loads without validating the data source or content. If an application invokes algo_from_pickle on an attacker-supplied pickle file, an object defining __reduce__ is executed during deserialization, resulting in arbitrary code execution in the context of the application.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00361 30th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed MONAI (Project-MONAI): 1.5.2

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	before 1.5.2	1.5.2	Patch available	CNA

MONAI VendorProject-MONAI Affected before 1.5.2 Fixed in 1.5.2 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:project-monai:monai::::::::	before 1.5.2	Vulnerable	Project-MONAI

cpe:2.3:a:project-monai:monai:*:*:*:*:*:*:*:* Versions before 1.5.2 Vulnerable ·Project-MONAI

Remediation

Fix · CNA MONAI (Project-MONAI) Fixed in 1.5.2

Timeline

2026-10-02 Threatist record created from CVE-2026-100846
2026-10-03 Alias added: GHSA-cvqf-4876-w239

References

Exploit 1

GitHub Security Advisory (GHSA-89gg-p5r5-q6r4)

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
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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