CVE-2026-55391
High
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 0.63.0, datamodel-code-generator validates a URL host once in src/datamodel_code_generator/http.py through get_body, _validate_url_for_fetch, and _get_ips_from_host, but then lets httpx resolve the host again for the connection, allowing DNS rebinding to bypass allow_private_network=False and reach internal services. This issue is fixed in version 0.63.0.
SeverityHigh
CVSS7.5
Exploit probability—
ProductKoxudaxi Datamodel-code-generator
PublishedJul 28, 2026
First seenJul 28, 2026
How to fix
Update
- koxudaxi datamodel-code-generator0.63.0 or later
- datamodel-code-generator0.63.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| koxudaxi datamodel-code-generator | v < 0.63.0 | 0.63.0 |
| datamodel-code-generatorPyPI | v < 0.63.0 | 0.63.0 |
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