---
id: CVE-2020-15142
aliases:
  - GHSA-9x4c-63pf-525f
  - PYSEC-2020-71
title: openapi-python-client Arbitrary Code Generation vulnerability
summary: openapi-python-client Arbitrary Code Generation vulnerability
severity: high
cvss: 8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H'
vendor: openapi-python-client
product: openapi-python-client
ecosystem: pip
affected:
  - openapi-python-client < 0.5.3
patched:
  - openapi-python-client 0.5.3
published: '2020-08-20'
updated: '2026-07-08'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-9x4c-63pf-525f'
references:
  - url: >-
      https://github.com/triaxtec/openapi-python-client/security/advisories/GHSA-9x4c-63pf-525f
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2020-15142'
  - url: >-
      https://github.com/openapi-generators/openapi-python-client/commit/f7a56aae32cba823a77a84a1f10400799b19c19a
  - url: >-
      https://github.com/triaxtec/openapi-python-client/commit/f7a56aae32cba823a77a84a1f10400799b19c19a
  - url: 'https://github.com/openapi-generators/openapi-python-client'
  - url: >-
      https://github.com/openapi-generators/openapi-python-client/releases/tag/v.0.5.3
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/openapi-python-client/PYSEC-2020-71.yaml
  - url: >-
      https://github.com/triaxtec/openapi-python-client/blob/main/CHANGELOG.md#053---2020-08-13
  - url: 'https://pypi.org/project/openapi-python-client'
tags:
  - osv
  - pip
epss: 0.01849
epssPercentile: 0.78193
ingestedAt: '2026-07-08T18:25:48.113Z'
---

## Overview

### Impact
Clients generated with a maliciously crafted OpenAPI Document can generate arbitrary Python code. Subsequent execution of this malicious client is arbitrary code execution.

Giving this a CVSS of 8.0 (high) with CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H/E:P/RL:U/RC:C .

### Patches
Fix will be included in version 0.5.3

### Workarounds
Inspect OpenAPI documents before generating, or inspect generated code before executing.

### For more information
If you have any questions or comments about this advisory:
* Open an issue in [openapi-python-client](https://github.com/triaxtec/openapi-python-client/issues)
* Email us at [danthony@triaxtec.com](mailto:danthony@triaxtec.com)

## Affected packages

- `openapi-python-client < 0.5.3`

## Remediation

Upgrade to a patched release:

- `openapi-python-client 0.5.3`