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CVE-2026-100846— MONAI before 1.5.2 Remote Code Execution via Pickle Deserialization

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 1.5.2 之前的版本中， 文件中的 函数存在反序列化不受信任数据的安全漏洞。该函数会读取一个 文件，并将其内容直接传递给 进行反序列化，期间未对数据源或内容进行任何验证。如果应用程序调用了 函数来处理由攻击者提供的 pickle 文件，那么在反序列化过程中，任何定义了 方法的对象都会被执行，从而导致在当前应用程序上下文中执行任意代码。

CVSS 7.6 · High EPSS 0.27% · P17

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2026-100846

Vulnerability Information
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Vulnerability Title
MONAI before 1.5.2 Remote Code Execution via Pickle Deserialization
Source: CVE Program / CVE List V5
Vulnerability Description
MONAI before 1.5.2 contains a deserialization of untrusted data vulnerability in the algo_from_pickle function in monai/auto3dseg/utils.py. The function reads a .pkl file and passes its contents to pickle.loads without validating the data source or content. If an application invokes algo_from_pickle on an attacker-supplied pickle file, an object defining __reduce__ is executed during deserialization, resulting in arbitrary code execution in the context of the application.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Project-MONAI MONAI 0 ~ 1.5.2 -

II. Public POCs for CVE-2026-100846

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III. Intelligence Information for CVE-2026-100846

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Vendor Advisories for CVE-2026-100846 (1)

Other References for CVE-2026-100846 (1)

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

CVE-2026-100844 8.4 HIGH MONAI before 1.6.0 OS Command Injection via dataset_name_or_id
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-2026-100842 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-502

V. Comments for CVE-2026-100846

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