CVE-2026-100846

High

Description

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.

SeverityHigh

CVSS7.6

Exploit probability—

ProductMonai

PublishedSep 27, 2026

First seenSep 27, 2026

Weakness typeCWE-502Deserialization of untrusted data

How to fix

Update

project-monai monai1.5.2 or later
monai1.6.0, 1.5.2 or later

Vendor advisories

github.com/Project-MONAI/MONAI/security/advisories/GHSA-89gg-p5r5-q6r4

Affected products

Product	Affected versions	Fixed in
project-monai monai	v < 1.5.2	1.5.2
monaiPyPI	v < 1.6.0, v < 1.5.2	1.6.0, 1.5.2

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