CVE-2026-56445

CRITICAL 9.1

pydicom pynetdicom Library Path Traversal

CVSS Score

9.1

EPSS Score

0.0%

EPSS Percentile

0th

The qrscp application's C-STORE handler uses a specific instance from attacker-supplied DICOM datasets directly in os.path.join() without sanitization, allowing file writes to arbitrary paths.

CWE	CWE-22
Vendor	pydicom
Product	pynetdicom library
Published	Jun 25, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Affected Versions

pydicom / pynetdicom Library

1.0.0 ≤ 3.0.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/pydicom/pynetdicom cisa.gov: https://www.cisa.gov/news-events/ics-medical-advisories/icsma-26-176-01 github.com: https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsma-26-176-01.json

Credits

Simon Weber and Volker Schönefeld of Machine Spirits UG reported this vulnerability to CISA.