id: PYSEC-2026-2266
published: "2026-03-20T02:16:33.600Z"
modified: "2026-07-13T05:51:02.610583Z"
aliases:
- CVE-2026-32711
- GHSA-v856-2rf8-9f28
details: 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:
- package:
    name: pydicom
    ecosystem: PyPI
    purl: pkg:pypi/pydicom
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: 2.0.0
    - fixed: 3.0.2
  versions:
  - 2.0.0
  - 2.1.0
  - 2.1.1
  - 2.1.2
  - 2.2.0
  - 2.2.0rc1
  - 2.2.1
  - 2.2.2
  - 2.3.0
  - 2.3.1
  - 2.4.0
  - 2.4.1
  - 2.4.2
  - 2.4.3
  - 2.4.4
  - 2.4.5
  - 3.0.0
  - 3.0.0rc1
  - 3.0.1
  ecosystem_specific: {}
references:
- type: ADVISORY
  url: https://github.com/pydicom/pydicom/releases/tag/v3.0.2
- type: FIX
  url: https://github.com/pydicom/pydicom/commit/6414f01a053dff925578799f5a7208d2ae585e82
- type: EVIDENCE
  url: https://github.com/pydicom/pydicom/security/advisories/GHSA-v856-2rf8-9f28
severity:
- type: CVSS_V3
  score: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H