What’s Vulnerable › Vulnerabilities

CVE-2026-32711: pydicom: Path traversal in FileSet/DICOMDIR ReferencedFileID allows file access outside the File-set root

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-20 · updated 2026-06-17
• Weakness: CWE-22

Description

pydicom is a pure Python package for working with DICOM files. Versions 2.0.0-rc.1 through 3.0.1 are vulnerable to Path Traversal through a maliciously crafted DICOMDIR ReferencedFileID when it is set to a path outside the File-set root. pydicom resolves the path only to confirm that it exists, but does not verify that the resolved path remains under the File-set root. Subsequent public FileSet operations such as copy(), write(), and remove()+write(use_existing=True) use that unchecked path in file I/O operations. This allows arbitrary file read/copy and, in some flows, move/delete outside the File-set root. This issue has been fixed in version 3.0.2.

Affected products

• pydicom: from 2.0.0 before 3.0.2 — fixed in 3.0.2

How to fix

Upgrade to a fixed version: pydicom 3.0.2. Check the vendor advisory for mitigations.

References

• https://github.com/pydicom/pydicom/commit/6414f01a053dff925578799f5a7208d2ae585e82
• https://github.com/pydicom/pydicom/releases/tag/v3.0.2
• https://github.com/pydicom/pydicom/security/advisories/GHSA-v856-2rf8-9f28

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