EUVD-2026-13433
GHSA-v856-2rf8-9f28
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
4Tags
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.
Analysis
Path traversal in pydicom versions 2.0.0-rc.1 through 3.0.1 allows local attackers to read, copy, or delete arbitrary files outside the File-set root directory by crafting malicious ReferencedFileID values in DICOMDIR files. The vulnerability exists because pydicom fails to validate that resolved file paths remain within the intended File-set root before performing file I/O operations like copy(), write(), and remove(). …
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Remediation
Within 24 hours: Identify all systems and applications using pydicom through software inventory and dependency scanning; restrict file-opening permissions to trusted users only. Within 7 days: Implement network segmentation to isolate systems processing DICOM files; disable pydicom functionality if non-critical; establish monitoring for suspicious file access patterns. …
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