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CVE-2026-100841— MONAI through 1.6.0 PersistentDataset Remote Code Execution via Pickle Cache

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 版本中，PersistentDataset（位于 monai/data/dataset.py 中）明确拒绝将 track_meta=True 与 weights_only=True 结合使用，从而迫使那些缓存 MetaTensors（MONAI >= 1.0 中的默认张量类型）的用户必须调用 torch.load(hashfile, weights_only=False)。monai/data/utils.py 中的相关缓存辅助函数还会对缓存内容执行 pickle.loads 操作，并使

CVSS 7.8 · High EPSS 0.12% · P2
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I. Basic Information for CVE-2026-100841

Vulnerability Information
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Vulnerability Title
MONAI through 1.6.0 PersistentDataset Remote Code Execution via Pickle Cache
Source: CVE Program / CVE List V5
Vulnerability Description
In MONAI 1.6.0, PersistentDataset (monai/data/dataset.py) explicitly rejects the combination track_meta=True with weights_only=True, forcing users who cache MetaTensors (the default tensor type in MONAI >= 1.0) to run torch.load(hashfile, weights_only=False). Related cache helpers in monai/data/utils.py also call pickle.loads on cached content and derive cache keys with hashlib.md5. As a result, a local user with write access to a shared or world-writable cache_dir (e.g. /tmp/monai_cache, HPC scratch, ~/.cache/monai) can place a malicious pickle file that is deserialized the next time another user's MONAI pipeline reads the cache, resulting in arbitrary code execution in that user's context. All released versions of the monai pip package are affected; no patched version is available as of the advisory.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/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 ~ 1.6.0 -

II. Public POCs for CVE-2026-100841

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III. Intelligence Information for CVE-2026-100841

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Vendor Advisories for CVE-2026-100841 (1)

Other References for CVE-2026-100841 (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-2026-100843 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-502

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