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CVE-2026-100844

7.8, high

Project-MONAI MONAI OS Command Injection Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.8, high high CVSS v3.1
EPSS, next 30 days
0.8% higher than 54.6% of scored CVEs
Exploitation
Exploit code published
Published
27 Sept 202620 days ago

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.

Details

Vendor
Project-MONAI
Product
MONAI
Weakness
CWE-78 (opens in a new tab)
Status
Analyzed
Updated
30 Sept 2026
Assigner
disclosure@vulncheck.com

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References 2

Exploit code 1

Advisories 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Project-MONAI CVEs

Every Project-MONAI CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-109360 Project-MONAI MONAI Deserialization of Untrusted Data Vulnerability EPSS 0.5% 7.5, high
  • CVE-2026-109361 Project-MONAI MONAI Deserialization of Untrusted Data Vulnerability EPSS 0.2% 7.3, high
  • CVE-2026-100842 Project-MONAI MONAI Eval Injection Vulnerability EPSS 0.1% 8.8, high
  • CVE-2026-100846 Project-MONAI MONAI Deserialization of Untrusted Data Vulnerability EPSS 0.3% 8.8, high

Beyond this page

Is CVE-2026-100844 in your network?

This page tells you how dangerous CVE-2026-100844 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.