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CVE-2026-100841: MONAI

Severity

8.5 (HIGH)

Vendor

PROJECT-MONAI

Affected versions

1.6.0

Patch status

Unpatched

Published

2026-09-27T02:17:22.543

Modified

2026-09-27T02:17:22.543

Why it matters

This matters because the affected product may allow code execution. Prioritize systems that are internet-facing or have privileged access to other infrastructure.

Recommended admin actions

• Review and patch based on exposure, asset criticality, and business impact.
• Apply compensating controls or temporarily remove exposure until a vendor fix is available.

Technical summary

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.

View the official NVD record for CVE-2026-100841

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.