Medium severity5.3OSV Advisory· Published Jan 7, 2026· Updated Jun 17, 2026
CVE-2026-21851
CVE-2026-21851
Description
MONAI (Medical Open Network for AI) is an AI toolkit for health care imaging. In versions up to and including 1.5.1, a Path Traversal (Zip Slip) vulnerability exists in MONAI's _download_from_ngc_private() function. The function uses zipfile.ZipFile.extractall() without path validation, while other similar download functions in the same codebase properly use the existing safe_extract_member() function. Commit 4014c8475626f20f158921ae0cf98ed259ae4d59 fixes this issue.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
monaiPyPI | < 1.5.2 | 1.5.2 |
Affected products
30.1.0, 0.1.0rc1, 0.1.0rc2, …+ 1 more
- (no CPE)range: 0.1.0, 0.1.0rc1, 0.1.0rc2, …
- cpe:2.3:a:project-monai:monai:*:*:*:*:*:*:*:*range: <=1.5.1
Patches
Vulnerability mechanics
References
4- github.com/Project-MONAI/MONAI/commit/4014c8475626f20f158921ae0cf98ed259ae4d59nvdPatchWEB
- github.com/Project-MONAI/MONAI/security/advisories/GHSA-9rg3-9pvr-6p27nvdExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-9rg3-9pvr-6p27ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-21851ghsaADVISORY
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