Vulnerability · Published Jul 28, 2026 · Assigned by GitHub_M

CVE-2026-55389datamodel-code-generator vulnerable to arbitrary local file read via JSON-Schema `$ref` (`file://` and `../` traversal), bypassing `--no-allow-remote-refs`

High 7.5

In plain English

A high-severity path traversal 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 0.5% (higher than 46% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.5%top 54.0% 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. Prior to 0.62.0, datamodel-code-generator resolves JSON Schema $ref targets in src/datamodel_code_generator/parser/jsonschema.py through is_url and _get_ref_body without containing file:// or ../ traversal references to the input directory and without honoring --no-allow-remote-refs, allowing arbitrary local file reads. This issue is fixed in version 0.62.0.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	datamodel-code-generator	0.62.0	GHSA-8359-h9fx-j6v9
PyPI	datamodel-code-generator	0.62.0	PYSEC-2026-3558

Affected products (as reported)

Vendor	Product	Versions
koxudaxi	datamodel-code-generator	< 0.62.0

Weakness: CWE-22, CWE-200, CWE-610 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/koxudaxi/datamodel-code-generator/security/advisories/GHSA-8359-h9fx-j6v9 x_refsource_CONFIRM
https://github.com/koxudaxi/datamodel-code-generator/commit/2ff4a72b4550a2b2069754c5b075b1655067e5fb x_refsource_MISC
https://github.com/koxudaxi/datamodel-code-generator/releases/tag/0.62.0 x_refsource_MISC