koxudaxi datamodel-code-generator up to 0.60.1 Validator Processing base_model.py _process_validators extra-template-data code injection

Summaryinfo

A vulnerability, which was classified as critical, has been found in koxudaxi datamodel-code-generator up to 0.60.1. Affected by this vulnerability is the function _process_validators of the file src/datamodel_code_generator/model/pydantic_v2/base_model.py of the component Validator Processing. Performing a manipulation of the argument extra-template-data results in code injection. This vulnerability is identified as CVE-2026-54656. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical has been found in koxudaxi datamodel-code-generator up to 0.60.1. This affects the function _process_validators of the file src/datamodel_code_generator/model/pydantic_v2/base_model.py of the component Validator Processing. The manipulation of the argument extra-template-data with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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 0.52.1 until 0.60.2, datamodel-code-generator interpolates validators from --extra-template-data in src/datamodel_code_generator/model/pydantic_v2/base_model.py through _process_validators into @field_validator decorators without safe validation, allowing Python code execution when the generated Pydantic v2 model is imported. This issue is fixed in version 0.60.2.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-54656 since 06/15/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059 for this issue.

Upgrading to version 0.60.2 eliminates this vulnerability.

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Productinfo

Vendor

• koxudaxi

Name

• datamodel-code-generator

Version

• 0.60.0
• 0.60.1

Website

• Product: https://github.com/koxudaxi/datamodel-code-generator/

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CPE 2.2info

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