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
References4
- github.com/koxudaxi/datamodel-code-generator/security/advisorie… ExploitVendor Advisory
- github.com/koxudaxi/datamodel-code-generator/security/advisorie… ExploitVendor Advisory
- github.com/koxudaxi/datamodel-code-generator/commit/577d49569c2… Patch
- github.com/koxudaxi/datamodel-code-generator/releases/tag/0.64.0 Release Notes
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 43 · as of 13 November 2026
- CWE
- CWE-94CWE-95
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.