CVE-2026-54655 `datamodel-code-generator` vulnerable to code execution on import via `x-python-type` JSON-Schema extension in datamodel-code-generator
Attacker-controlled JSON Schema content can execute Python code when generated modules are imported, affecting users of datamodel-code-generator.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-54655?
CVE-2026-54655 is a high-severity code injection vulnerability in koxudaxi datamodel-code-generator, published on 28 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
datamodel-code-generator generates Python data models from schema definitions. From 0.51.0 until 0.60.2, x-python-type values parsed by src/datamodel_code_generator/parser/jsonschema.py in _get_python_type_override are inserted into generated field annotations without sufficient validation, allowing attacker-controlled JSON Schema content to execute Python code when the generated module is imported. This issue is fixed in version 0.60.2.
Weakness: CWE-94
Which versions are affected by CVE-2026-54655?
3 open source packages ship an affected version, including datamodel-code-generator.
| Package | Affected | Fixed in |
|---|---|---|
datamodel-code-generator PyPI | From 0.51.0 | 0.60.2 |
datamodel-code-generator PyPI | From 0.51.0 | 0.60.2 |
datamodel-code-generator PyPI | From 0.51.0 | 0.60.2 |
How do I fix CVE-2026-54655?
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-2026-54655 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54655 exists.
Sources
Also known as GHSA-m34r-v34r-rf9q, PYSEC-2026-3562.