CVE-2026-54653

Received Received - Intake

Remote Code Execution in datamodel-code-generator

Publication date: 2026-07-28

Last updated on: 2026-07-28

Assigner: GitHub, Inc.

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.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-28

Last Modified

2026-07-28

Generated

2026-07-29

AI Q&A

2026-07-29

EPSS Evaluated

N/A

NVD

CVE-2026-54653

Affected Vendors & Products

Vendor	Product	Version / Range
datamodel-code-generator	datamodel-code-generator	to 0.60.2 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
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.
CWE-1336	The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine.

Attack-Flow Graph

Executive Summary

The vulnerability in datamodel-code-generator allows attackers to inject malicious Python expressions into default_factory values. These values are preserved during model generation and executed when the generated model is imported, enabling arbitrary code execution.

Detection Guidance

Check if your system uses datamodel-code-generator versions between 0.17.0 and 0.60.2. Run: pip show datamodel-code-generator. If installed, verify the version matches the vulnerable range.

Impact Analysis

If you use affected versions (0.17.0 to 0.60.2) of datamodel-code-generator, an attacker could craft malicious input files that execute arbitrary code when you import the generated models. This could lead to data breaches, system compromise, or further attacks.

Compliance Impact

This vulnerability could violate GDPR and HIPAA by enabling unauthorized code execution, potentially leading to data exfiltration or system manipulation. Organizations using affected versions may face compliance violations and legal consequences.

Mitigation Strategies

Upgrade datamodel-code-generator to version 0.60.2 or later immediately. Run: pip install --upgrade datamodel-code-generator. Review generated code for suspicious default_factory values in Field or field definitions.

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