CVE-2026-55415: datamodel-code-generator vulnerable to code injection via `x-python-import` / `customTypePath` in generated import statements

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-07-28 · updated 2026-10-23
Weakness: CWE-94

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 0.11.6 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

How to fix

Upgrade to a fixed version: koxudaxi datamodel-code-generator 0.64.0. Check the vendor advisory for mitigations.

References

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