---
id: CVE-2026-108384
title: >-
  dataclasses-avroschema generates Avro schemas from Python dataclasses,
  Pydantic models, and Faust Records and generates Python code from Avro schemas
summary: >-
  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 typ…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-94
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T21:17:34.450'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-108384'
references:
  - url: >-
      https://github.com/marcosschroh/dataclasses-avroschema/commit/429f3d705d2d04c0c65e2ef832daed5ff91318fc
    label: security-advisories@github.com
  - url: 'https://github.com/marcosschroh/dataclasses-avroschema/releases/tag/0.70.6'
    label: security-advisories@github.com
  - url: >-
      https://github.com/marcosschroh/dataclasses-avroschema/security/advisories/GHSA-8j5c-xq6f-2c43
    label: security-advisories@github.com
tags:
  - nvd
ingestedAt: '2026-10-13T18:41:42.740Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.