Project-MONAI up to 1.6.0 Configuration Engine monai.bundle.load code injection

Summaryinfo

A vulnerability described as critical has been identified in Project-MONAI MONAI up to 1.6.0. Affected is the function monai.bundle.load of the component Configuration Engine. The manipulation results in code injection. This vulnerability is reported as CVE-2026-100840. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, was found in Project-MONAI MONAI up to 1.6.0. Affected is the function monai.bundle.load of the component Configuration Engine. The manipulation with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

MONAI through 1.6.0 contains a remote code execution vulnerability in the bundle configuration engine that resolves _target_ values to arbitrary importable callables without an allow list and passes $ expressions to Python eval(). Attackers can publish a malicious bundle with crafted configuration containing arbitrary code that executes when a victim loads the bundle using monai.bundle.load() or monai.bundle.run().

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-100840 since 09/27/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Project Management Software

Vendor

• Project-MONAI

Name

• MONAI

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6.0

Website

• Product: https://github.com/Project-MONAI/MONAI/

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