Path Traversal in Pydicom
CVE-2026-32711
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (11.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.002 · change: -0.001
Affected products
- Pydicom — versions >= 2.0.0-rc.1, < 3.0.2
Weakness classification (CWE)
References
- github.com/pydicom/pydicom/security/advisories/GHSA-v856-2rf8-9f28 (Exploit, Vendor Advisory)
- github.com/pydicom/pydicom/commit/6414f01a053dff925578799f5a7208d2ae585e82 (Patch)
- github.com/pydicom/pydicom/releases/tag/v3.0.2 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-32711?
- CVE-2026-32711 is a high-severity vulnerability in Pydicom, classified under Path Traversal. CVSS score: 7.8/10. Published 2026-03-20.
- How severe is CVE-2026-32711?
- High severity. CVSS v3 base score is 7.8 out of 10.