CVE Catalog

CVE-2026-108384

HighCVSS 8.8
Published: Updated: Translated: NVD NIST

Summary

The dataclasses-avroschema library versions 0.38.0 through 0.70.5 improperly handles the aliases value of a fixed type, inserting it unquoted into a types.confixed annotation. This allows arbitrary Python code execution when the generated module is imported.

Risk Assessment

An attacker able to supply a crafted Avro schema can execute arbitrary Python code in the application context, leading to full system compromise.

Recommendation

Update the dataclasses-avroschema library to version 0.70.6 or later, which rejects aliases values that are not lists.

Other vulnerabilities in dataclasses-avroschema

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Original NVD description (English source)

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, BaseGenerator.parse_fixed interpolates a fixed type's aliases value directly into a generated types.confixed annotation. A list is represented with quoted entries, but a bare string is emitted as an unquoted Python expression and evaluated when the generated module is imported, allowing arbitrary code execution from a crafted schema. Version 0.70.6 fixes the vulnerability by rejecting aliases values that are not lists.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS