CVE-2026-100844: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in Project-MONAI MONAI
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.
CVE-2026-100844: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in Project-MONAI MONAI
Description
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.
CVSS v4.0
Score 8.6high
Affected software
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-27T00:18:40.971Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Gcve Source
- db.gcve.eu
Threat ID: 6ab89bc5f7a7c54106941ef0
Added to database: 09/27/2026, 04:29:57 UTC
Last updated: 09/27/2026, 04:29:57 UTC
Views: 1
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