Vulnerability · Published Jul 28, 2026 · Assigned by GitHub_M

CVE-2026-54656`datamodel-code-generator` vulnerable to code execution on import via unescaped `validators` entries in --extra-template-data

High 7.8

In plain English

A high-severity code injection in datamodel-code-generator from koxudaxi. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High

Exploit odds (30 days)0.3%top 83.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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 0.52.1 until 0.60.2, datamodel-code-generator interpolates validators from --extra-template-data in src/datamodel_code_generator/model/pydantic_v2/base_model.py through _process_validators into @field_validator decorators without safe validation, allowing Python code execution when the generated Pydantic v2 model is imported. This issue is fixed in version 0.60.2.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	datamodel-code-generator	0.60.2	GHSA-8m8r-38jm-f355
PyPI	datamodel-code-generator	0.60.2	PYSEC-2026-3559

Affected products (as reported)

Vendor	Product	Versions
koxudaxi	datamodel-code-generator	>= 0.52.1, < 0.60.2

Weakness: CWE-94 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

https://github.com/koxudaxi/datamodel-code-generator/security/advisories/GHSA-8m8r-38jm-f355 x_refsource_CONFIRM
https://github.com/koxudaxi/datamodel-code-generator/commit/a43d02906111a2fdcaf13ee5b62eb2da85376f19 x_refsource_MISC
https://github.com/koxudaxi/datamodel-code-generator/releases/tag/0.60.2 x_refsource_MISC