koxudaxi datamodel-code-generator up to 0.60.1 JsonSchemaParser jsonschema.py JsonSchemaObject.init/get_field_extras code injection

Summaryinfo

A vulnerability classified as critical was found in koxudaxi datamodel-code-generator up to 0.60.1. Affected is the function JsonSchemaObject.init/get_field_extras of the file src/datamodel_code_generator/parser/jsonschema.py of the component JsonSchemaParser. Such manipulation leads to code injection. This vulnerability is referenced as CVE-2026-54653. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in koxudaxi datamodel-code-generator up to 0.60.1. It has been rated as critical. Affected by this issue is the function JsonSchemaObject.init/get_field_extras of the file src/datamodel_code_generator/parser/jsonschema.py of the component JsonSchemaParser. The manipulation with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to 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. Impacted is 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 0.17.0 until 0.60.2, datamodel-code-generator preserves attacker-controlled default_factory values in src/datamodel_code_generator/parser/jsonschema.py through JsonSchemaObject.init and get_field_extras and emits them into Field(default_factory=...) or field(default_factory=...), allowing Python expression execution when the generated model is imported. This issue is fixed in version 0.60.2.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-54653 since 06/15/2026. The exploitation is known to be easy. The attack may be launched 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 0.60.2 eliminates this vulnerability.

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Productinfo

Vendor

• koxudaxi

Name

• datamodel-code-generator

Version

• 0.60.0
• 0.60.1

Website

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

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CPE 2.2info

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