koxudaxi datamodel-code-generator up to 0.62.x URL Validation http.py get_body dns rebinding

Summaryinfo

A vulnerability was found in koxudaxi datamodel-code-generator up to 0.62.x. It has been declared as critical. Impacted is the function get_body of the file src/datamodel_code_generator/http.py of the component URL Validation. Such manipulation leads to dns rebinding. This vulnerability is documented as CVE-2026-55391. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in koxudaxi datamodel-code-generator up to 0.62.x and classified as critical. Affected by this issue is the function get_body of the file src/datamodel_code_generator/http.py of the component URL Validation. The manipulation with an unknown input leads to a dns rebinding vulnerability. Using CWE to declare the problem leads to CWE-350. The product performs reverse DNS resolution on an IP address to obtain the hostname and make a security decision, but it does not properly ensure that the IP address is truly associated with the hostname. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-55391 since 06/16/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1583.002 by the MITRE ATT&CK project.

Upgrading to version 0.63.0 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• koxudaxi

Name

• datamodel-code-generator

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31
• 0.32
• 0.33
• 0.34
• 0.35
• 0.36
• 0.37
• 0.38
• 0.39
• 0.40
• 0.41
• 0.42
• 0.43
• 0.44
• 0.45
• 0.46
• 0.47
• 0.48
• 0.49
• 0.50
• 0.51
• 0.52
• 0.53
• 0.54
• 0.55
• 0.56
• 0.57
• 0.58
• 0.59
• 0.60
• 0.61
• 0.62

Website

• Product: https://github.com/koxudaxi/datamodel-code-generator/

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