CVE-2026-54653 `datamodel-code-generator` vulnerable to code injection in via attacker-controlled `default_factory` schema field
Attackers can execute arbitrary Python code by injecting malicious expressions into the default_factory field of generated models.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-54653?
CVE-2026-54653 is a high-severity code injection vulnerability in koxudaxi datamodel-code-generator, published on 28 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-54653?
3 open source packages ship an affected version, including datamodel-code-generator. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
datamodel-code-generator PyPI | From 0.17.0 | 0.60.2 |
datamodel-code-generator PyPI | From 0.17.0 | 0.60.2 |
datamodel-code-generator PyPI | From 0.17.0 | 0.60.2 |
Products include Koxudaxi Datamodel-Code-Generator.
How do I fix CVE-2026-54653?
Upgrade datamodel-code-generator to 0.60.2 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-54653 being exploited?
There is no known exploitation of CVE-2026-54653 in the wild and no public exploit code.
Other vulnerabilities in koxudaxi datamodel-code-generator
- CVE-2026-54690 datamodel-code-generator vulnerable to SSRF via JSON-Schema `$ref` to HTTP URL (silent by default)
- CVE-2026-54656 `datamodel-code-generator` vulnerable to code execution on import via unescaped `validators` entries in --extra-template-data
- CVE-2026-55389 datamodel-code-generator vulnerable to arbitrary local file read via JSON-Schema `$ref` (`file://` and `../` traversal), bypassing `--no-allow-remote-refs`
- CVE-2026-55391 datamodel-code-generator vulnerable to SSRF protection bypass via DNS rebinding
- CVE-2026-55415 datamodel-code-generator vulnerable to code injection via `x-python-import` / `customTypePath` in generated import statements
Sources
Also known as GHSA-386q-5hp3-95m9, MINI-qxgq-537q-pph4, PYSEC-2026-3555.