CVE-2026-54653: Koxudaxi Datamodel-Code-Generator

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Koxudaxi Datamodel-Code-Generator: from 0.17.0, before 0.60.2 (fixed in 0.60.2)

Published 2026-07-28. Last modified 2026-08-06.