pydicom pynetdicom Library

View CSAF Summary Successful exploitation of this vulnerability could allow an unauthenticated attacker to write to arbitrary file paths. The following versions of pydicom pynetdicom Library are affected: pynetdicom >=v1.0.0|<v3.0.4 CVSS Vendor Equipment Vulnerabilities v3 9.1 pydicom pydicom pynetdicom Library Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') Background Critical Infrastructure Sectors: Healthcare and Public Health Countries/Areas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2026-56445 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. View CVE Details Affected Products pydicom pynetdicom Library Vendor: pydicom Product Version: pydicom pynetdicom: >=v1.0.0|<v3.0.4 Product Status: known_affected Remediations Vendor fix The maintainer of pynetdicom has not responded to requests to work with CISA to mitigate this vulnerability. For update information, refer to the github page https://github.com/pydicom/pynetdicom. https://github.com/pydicom/pynetdicom Relevant CWE: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') Metrics CVSS Version Base Score Base Severity Vector String 3.1 9.1 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H 4.0 8.8 HIGH CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N Acknowledgments Simon Weber and Volker Schönefeld of Machine Spirits UG reported this vulnerability to CISA Legal Notice and Terms of Use This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Minimize network exposure for all control system devices and/or systems