koxudaxi datamodel-code-generator up to 0.63.9 Import imports.py Import.from_full_path/Imports.create_line x-python-import/customTypePath code injection

Summaryinfo

A vulnerability was found in koxudaxi datamodel-code-generator up to 0.63.9 and classified as critical. This vulnerability affects the function Import.from_full_path/Imports.create_line of the file src/datamodel_code_generator/parser/jsonschema.py/src/datamodel_code_generator/imports.py of the component Import Handler. The manipulation of the argument x-python-import/customTypePath results in code injection. This vulnerability is cataloged as CVE-2026-55415. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in koxudaxi datamodel-code-generator up to 0.63.9. Affected is the function Import.from_full_path/Imports.create_line of the file src/datamodel_code_generator/parser/jsonschema.py/src/datamodel_code_generator/imports.py of the component Import Handler. The manipulation of the argument x-python-import/customTypePath with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

datamodel-code-generator generates Pydantic v2 models, dataclasses, TypedDict, and msgspec.Struct from OpenAPI, JSON Schema, GraphQL, Avro, Protobuf, and raw JSON, YAML, or CSV. From 0.11.6 until 0.64.0, datamodel-code-generator allows attacker-controlled x-python-import or customTypePath schema extensions to reach src/datamodel_code_generator/parser/jsonschema.py and generated import handling through Import.from_full_path and Imports.create_line in src/datamodel_code_generator/imports.py, allowing a newline to break out of an import statement and execute Python code when the generated model is imported. This issue is fixed in version 0.64.0.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-55415 since 06/16/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.

Upgrading to version 0.64.0 eliminates this vulnerability.

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Productinfo

Vendor

• koxudaxi

Name

• datamodel-code-generator

Version

• 0.63.0
• 0.63.1
• 0.63.2
• 0.63.3
• 0.63.4
• 0.63.5
• 0.63.6
• 0.63.7
• 0.63.8
• 0.63.9

Website

• Product: https://github.com/koxudaxi/datamodel-code-generator/

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