marcosschroh dataclasses-avroschema up to 0.70.5 Field Default FieldRepresentation.get_field_default code injection

Summaryinfo

A vulnerability categorized as critical has been discovered in marcosschroh dataclasses-avroschema up to 0.70.5. The affected element is the function FieldRepresentation.get_field_default of the component Field Default Handler. The manipulation results in code injection. This vulnerability is reported as CVE-2026-108375. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in marcosschroh dataclasses-avroschema up to 0.70.5. Affected is the function FieldRepresentation.get_field_default of the component Field Default Handler. The manipulation with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

dataclasses-avroschema generates Avro schemas from Python dataclasses, Pydantic models, and Faust Records and generates Python code from Avro schemas. From version 0.38.0 through 0.70.5, FieldRepresentation.get_field_default inserts schema-controlled string, UUID, bytes, and fixed field defaults into quoted literals in generated Python source without escaping them. A crafted default can terminate the literal and inject statements into the generated module, which execute when the module is imported. Version 0.70.6 fixes the vulnerability by escaping schema values rendered into generated string literals.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-108375 since 10/09/2026. The exploitability is told to be easy. It is possible to launch the attack 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 T1059.

Upgrading to version 0.70.6 eliminates this vulnerability.

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Productinfo

Vendor

• marcosschroh

Name

• dataclasses-avroschema

Version

• 0.70.0
• 0.70.1
• 0.70.2
• 0.70.3
• 0.70.4
• 0.70.5

Website

• Product: https://github.com/marcosschroh/dataclasses-avroschema/

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