VYPR
High severityNVD Advisory· Published Jul 28, 2026· Updated Jul 29, 2026

`datamodel-code-generator` vulnerable to code injection in via attacker-controlled `default_factory` schema field

CVE-2026-54653

Description

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
datamodel-code-generatorPyPI
>= 0.17.0, < 0.60.20.60.2

Affected products

2

Patches

Vulnerability mechanics

References

4

News mentions

0

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