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CVE-2026-100844: Product identification pending

Severity

8.6 (HIGH)

Vendor

MONAI BEFORE

Affected versions

Before 1.6.0

Fixed version

1.6.0

Patch status

Patched

Published

2026-09-27T02:17:22.993

Modified

2026-09-27T02:17:22.993

Why it matters

High-severity vulnerability requiring prioritized review.

Recommended admin actions

• Review and patch based on exposure, asset criticality, and business impact.
• Compare installed versions against the affected version range in the advisory.

Technical summary

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.

View the official NVD record for CVE-2026-100844

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.