Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-55391

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 9.6%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-55391


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