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CVE-2026-100844

8.4 · HIGH

MONAI before 1.6.0 is vulnerable to OS command injection in the nnUNetV2Runner component (monai.apps.nnunet.nnunetv2_runner).

Published Sep 27, 2026project-monaiCWE-78EPSS 0.92%

Overview

CVE-2026-100844 is a high-severity vulnerability affecting project-monai monai. It was published on September 27, 2026 and has a CVSS 3.1 base score of 8.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from project-monai. Update monai to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
project-monaimonai>= 0, < 1.6.0Affected

References

GitHubgithub.com/Project-MONAI/MONAI/security/advisories/GHSA-rghg-q7wp-9767Refwww.vulncheck.com/advisories/monai-before-1.6.0-os-command-injection-via-dataset-name-or-idGitHubgithub.com/Project-MONAI/MONAI/security/advisories/GHSA-rghg-q7wp-9767

How CyberStrike helps

Frequently asked questions

What is CVE-2026-100844?

CVE-2026-100844 is a high-severity vulnerability affecting project-monai monai. It was published on September 27, 2026 and has a CVSS 3.1 base score of 8.4 (HIGH).

How severe is CVE-2026-100844?

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-100844?

Check the references section for vendor advisories and patches from project-monai. Update monai to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-100844?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-100844 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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