CVE-2026-55415: Koxudaxi Datamodel-Code-Generator

High severity, CVSS 7.5. EPSS: 0.5% 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 0.11.6 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.

Affected products

• Koxudaxi Datamodel-Code-Generator: from 0.11.6, before 0.64.0 (fixed in 0.64.0)

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