CVE-2026-55391
7.5
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| koxudaxi | datamodel-code-generator | < 0.63.0 | affected |
Weaknesses
- CWE-350: CWE-350: Reliance on Reverse DNS Resolution for a Security-Critical Action
- CWE-367: CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition
- CWE-918: CWE-918: Server-Side Request Forgery (SSRF)
References
- https://github.com/koxudaxi/datamodel-code-generator/security/advisories/GHSA-vx7x-vcc2-c44g
- https://github.com/koxudaxi/datamodel-code-generator/commit/25c8b7e497419eb20b230fa3318c04f9bebc5a6f
- https://github.com/koxudaxi/datamodel-code-generator/releases/tag/0.63.0
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