Deserialization of Untrusted Data Affecting monai package, versions [,1.6.0)
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Start learning- Snyk IDSNYK-PYTHON-MONAI-18960423
- published19 Aug 2026
- disclosed18 Aug 2026
- creditRomain Deperne
Introduced: 18 Aug 2026
New CVE NOT AVAILABLE CWE-502 (opens in a new tab)How to fix?
Upgrade monai to version 1.6.0 or higher.
Overview
monai is an AI Toolkit for Healthcare Imaging
Affected versions of this package are vulnerable to Deserialization of Untrusted Data via NumpyReader.read() in monai/data/image_reader.py, which called numpy.load() with allow_pickle=True unconditionally. An attacker who can supply a malicious NPY or NPZ file containing pickled objects can achieve arbitrary code execution when the file is loaded by the victim.
Details
Serialization is a process of converting an object into a sequence of bytes which can be persisted to a disk or database or can be sent through streams. The reverse process of creating object from sequence of bytes is called deserialization. Serialization is commonly used for communication (sharing objects between multiple hosts) and persistence (store the object state in a file or a database). It is an integral part of popular protocols like Remote Method Invocation (RMI), Java Management Extension (JMX), Java Messaging System (JMS), Action Message Format (AMF), Java Server Faces (JSF) ViewState, etc.
Deserialization of untrusted data (CWE-502) is when the application deserializes untrusted data without sufficiently verifying that the resulting data will be valid, thus allowing the attacker to control the state or the flow of the execution.