Vulnerability Details CVE-2026-100844
MONAI before 1.6.0 is vulnerable to OS command injection in the nnUNetV2Runner component (monai.apps.nnunet.nnunetv2_runner). User-controlled values taken from the YAML configuration file (notably dataset_name_or_id) and from CLI/kwargs arguments are concatenated into a command string without quoting or validation and then passed to subprocess with shell=True, so shell metacharacters (e.g., ';' on Linux, '&' on Windows) are interpreted. If a victim loads and processes a crafted configuration file — for example by instantiating nnUNetV2Runner with the malicious YAML and invoking a training/validation job such as train_single_model() — arbitrary commands are executed with the privileges of the user running the job.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.006
EPSS Ranking 48.7%
CVSS Severity
CVSS v3 Score 8.4
References
Products affected by CVE-2026-100844
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cpe:2.3:a:project-monai:monai:0.1.0
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cpe:2.3:a:project-monai:monai:0.2.0
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cpe:2.3:a:project-monai:monai:0.3.0
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cpe:2.3:a:project-monai:monai:0.4.0
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cpe:2.3:a:project-monai:monai:0.5.0
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cpe:2.3:a:project-monai:monai:0.5.1
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cpe:2.3:a:project-monai:monai:0.5.2
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cpe:2.3:a:project-monai:monai:0.5.3
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cpe:2.3:a:project-monai:monai:0.6.0
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cpe:2.3:a:project-monai:monai:0.7.0
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cpe:2.3:a:project-monai:monai:0.8.0
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cpe:2.3:a:project-monai:monai:0.8.1
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cpe:2.3:a:project-monai:monai:0.9.0
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cpe:2.3:a:project-monai:monai:0.9.1
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cpe:2.3:a:project-monai:monai:1.0.0
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cpe:2.3:a:project-monai:monai:1.0.1
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cpe:2.3:a:project-monai:monai:1.1.0
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cpe:2.3:a:project-monai:monai:1.2.0
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cpe:2.3:a:project-monai:monai:1.3.0
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cpe:2.3:a:project-monai:monai:1.3.1
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cpe:2.3:a:project-monai:monai:1.3.2
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cpe:2.3:a:project-monai:monai:1.3.3
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cpe:2.3:a:project-monai:monai:1.4.0
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cpe:2.3:a:project-monai:monai:1.4.1
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cpe:2.3:a:project-monai:monai:1.5.0
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cpe:2.3:a:project-monai:monai:1.5.1
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cpe:2.3:a:project-monai:monai:1.5.2