CVE-2026-55391 – datamodel-code-generator vulnerable to SSRF protection bypass via DNS rebinding

CVE ID :CVE-2026-55391

Published : July 28, 2026, 10:17 p.m. | 22 minutes ago

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.

Severity: 7.5 | HIGH

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