koxudaxi datamodel-code-generator up to 0.61.x JSON Schema Parser jsonschema.py _get_ref_body path traversal

Summaryinfo

A vulnerability categorized as problematic has been discovered in koxudaxi datamodel-code-generator up to 0.61.x. The impacted element is the function _get_ref_body of the file src/datamodel_code_generator/parser/jsonschema.py of the component JSON Schema Parser. Executing a manipulation can lead to path traversal. This vulnerability appears as CVE-2026-55389. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in koxudaxi datamodel-code-generator up to 0.61.x. It has been declared as problematic. This vulnerability affects the function _get_ref_body of the file src/datamodel_code_generator/parser/jsonschema.py of the component JSON Schema Parser. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality. 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 0.62.0, datamodel-code-generator resolves JSON Schema $ref targets in src/datamodel_code_generator/parser/jsonschema.py through is_url and _get_ref_body without containing file:// or ../ traversal references to the input directory and without honoring --no-allow-remote-refs, allowing arbitrary local file reads. This issue is fixed in version 0.62.0.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-55389 since 06/16/2026. The exploitation appears to be easy. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 0.62.0 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

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

Website

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

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