Arbitrary Code Injection Affecting dataclasses-avroschema package, versions [,0.70.6)


Severity

Recommended
0.0
critical
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.45% (38th percentile)

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  • Snyk IDSNYK-PYTHON-DATACLASSESAVROSCHEMA-21693582
  • published24 Oct 2026
  • disclosed13 Oct 2026
  • creditUnknown

Introduced: 13 Oct 2026

NewCVE-2026-108380  (opens in a new tab)
CWE-94  (opens in a new tab)

How to fix?

Upgrade dataclasses-avroschema to version 0.70.6 or higher.

Overview

dataclasses-avroschema is a Generate Avro Schemas from Python classes. Serialize/Deserialize python instances with avro schemas

Affected versions of this package are vulnerable to Arbitrary Code Injection via the PydanticFieldRepresentation.add_field_properties function. An attacker can execute arbitrary Python code by crafting a malicious schema field documentation value that is injected and evaluated during generated class definition.

CVSS Base Scores

version 4.0
version 3.1