CVE-2026-54654: Koxudaxi Datamodel-Code-Generator

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

datamodel-code-generator generates Python data models from schema definitions. From 0.14.1 until 0.60.2, the --extra-template-data comment field is rendered into Python comments in src/datamodel_code_generator/model/template/TypeAliasAnnotation.jinja2, src/datamodel_code_generator/model/template/TypedDict.jinja2, src/datamodel_code_generator/model/template/dataclass.jinja2, src/datamodel_code_generator/model/template/msgspec.Struct.jinja2, src/datamodel_code_generator/model/template/pydantic/BaseModel.jinja2, and src/datamodel_code_generator/model/template/pydantic_v2/BaseModel.jinja2 without neutralizing carriage returns in Python # comments, allowing an attacker-controlled comment value to inject Python code into generated models that runs when imported. This issue is fixed in version 0.60.2.

Affected products

• Koxudaxi Datamodel-Code-Generator: from 0.14.1, before 0.60.2 (fixed in 0.60.2)

Published 2026-07-28. Last modified 2026-07-30.