pydicom pynetdicom Library up to 3.0.4 STORE os.path.join path traversal

Summaryinfo

A vulnerability has been found in pydicom pynetdicom Library up to 3.0.4 and classified as critical. Affected by this vulnerability is the function os.path.join of the component STORE Handler. Performing a manipulation results in path traversal. This vulnerability is known as CVE-2026-56445. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in pydicom pynetdicom Library up to 3.0.4. It has been classified as critical. This affects the function os.path.join of the component STORE Handler. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on integrity, and availability. The summary by CVE is:

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.

The weakness was published by Simon Weber and Volker Schönefeld. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-56445 since 06/22/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/26/2026). The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Software Library

Vendor

• pydicom

Name

• pynetdicom Library

Version

• 3.0.0
• 3.0.1
• 3.0.2
• 3.0.3
• 3.0.4

CPE 2.3info

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CPE 2.2info

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Entryinfo

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