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CVE-2026-100844— MONAI before 1.6.0 OS Command Injection via dataset_name_or_id

Quick assessment

Affected
Project-MONAI MONAI
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 MONAI 1.6.0 之前的版本中，nnUNetV2Runner 组件（monai.apps.nnunet.nnunetv2_runner）存在操作系统命令注入漏洞。攻击者可以利用来自 YAML 配置文件（特别是 dataset_name_or_id 字段）以及命令行参数或 kwargs 参数中的用户可控值，这些值在被拼接成命令字符串时，未经过任何引用或验证处理，随后以 shell=True 的方式传递给 subprocess 模块执行，导致 Shell 元字符（例如 Linux 上的“;”和 Windows

CVSS 8.4 · High EPSS 0.64% · P49
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I. Basic Information for CVE-2026-100844

Vulnerability Information
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Vulnerability Title
MONAI before 1.6.0 OS Command Injection via dataset_name_or_id
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Project-MONAI MONAI 0 ~ 1.6.0 -

II. Public POCs for CVE-2026-100844

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III. Intelligence Information for CVE-2026-100844

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Vendor Advisories for CVE-2026-100844 (1)

Other References for CVE-2026-100844 (1)

Same Patch Batch · Project-MONAI · 2026-09-27 · 7 CVEs total

CVE-2026-100841 7.8 HIGH MONAI through 1.6.0 PersistentDataset Remote Code Execution via Pickle Cache
CVE-2026-100843 7.8 HIGH MONAI before 1.6.0 Remote Code Execution via algo_from_pickle
CVE-2026-100845 7.8 HIGH MONAI before 1.6.0 Remote Code Execution via NumpyReader
CVE-2026-100840 7.8 HIGH MONAI through 1.6.0 Remote Code Execution via bundle configuration
CVE-2026-100846 7.6 HIGH MONAI before 1.5.2 Remote Code Execution via Pickle Deserialization
CVE-2026-100842 7.0 HIGH MONAI through 1.6.0 _get_fake_spatial_shape eval() Sandbox Bypass via Attribute Chains

IV. Related Vulnerabilities

Same product: MONAI
Same vendor: Project-MONAI
Same weakness: CWE-78

V. Comments for CVE-2026-100844

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