---
id: CVE-2020-27619
title: >-
  In Python 3 through 3.9.0, the Lib/test/multibytecodec_support.py CJK codec
  tests call eval() on content retrieved via HTTP.
summary: >-
  In Python 3 through 3.9.0, the Lib/test/multibytecodec_support.py CJK codec
  tests call eval() on content retrieved via HTTP.
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: python
product: python
affected:
  - 'python >= 3.0.0, < 3.6.13'
  - 'python >= 3.7.0, < 3.7.10'
  - 'python >= 3.8.0, < 3.8.7'
  - 'python >= 3.9.0, < 3.9.1'
  - fedora = 33
  - fedora = 34
  - >-
    communications_cloud_native_core_network_function_cloud_native_environment =
    22.2.0
patched:
  - python 3.9.1
published: '2020-10-22'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T21:17:27.533'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-27619'
references:
  - url: 'https://bugs.python.org/issue41944'
    label: cve@mitre.org
  - url: >-
      https://github.com/python/cpython/commit/2ef5caa58febc8968e670e39e3d37cf8eef3cab8
    label: cve@mitre.org
  - url: >-
      https://github.com/python/cpython/commit/43e523103886af66d6c27cd72431b5d9d14cd2a9
    label: cve@mitre.org
  - url: >-
      https://github.com/python/cpython/commit/6c6c256df3636ff6f6136820afaefa5a10a3ac33
    label: cve@mitre.org
  - url: >-
      https://github.com/python/cpython/commit/b664a1df4ee71d3760ab937653b10997081b1794
    label: cve@mitre.org
  - url: >-
      https://github.com/python/cpython/commit/e912e945f2960029d039d3390ea08835ad39374b
    label: cve@mitre.org
  - url: >-
      https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
    label: cve@mitre.org
  - url: >-
      https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
    label: cve@mitre.org
  - url: >-
      https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RSLQD5CCM75IZGAMBDGUZEATYU5YSGJ7/
    label: cve@mitre.org
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SGIY6I4YS3WOXAK4SXKIEOC2G4VZKIR7/
    label: cve@mitre.org
  - url: 'https://security.gentoo.org/glsa/202402-04'
    label: cve@mitre.org
  - url: 'https://security.netapp.com/advisory/ntap-20201123-0004/'
    label: cve@mitre.org
  - url: 'https://www.oracle.com/security-alerts/cpujul2022.html'
    label: cve@mitre.org
  - url: 'https://bugs.python.org/issue41944'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/python/cpython/commit/2ef5caa58febc8968e670e39e3d37cf8eef3cab8
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/python/cpython/commit/43e523103886af66d6c27cd72431b5d9d14cd2a9
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/python/cpython/commit/6c6c256df3636ff6f6136820afaefa5a10a3ac33
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/python/cpython/commit/b664a1df4ee71d3760ab937653b10997081b1794
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://github.com/python/cpython/commit/e912e945f2960029d039d3390ea08835ad39374b
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RSLQD5CCM75IZGAMBDGUZEATYU5YSGJ7/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SGIY6I4YS3WOXAK4SXKIEOC2G4VZKIR7/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.gentoo.org/glsa/202402-04'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20201123-0004/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.oracle.com/security-alerts/cpujul2022.html'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.08334
epssPercentile: 0.94817
ingestedAt: '2026-10-08T22:11:53.722Z'
---

## Overview

In Python 3 through 3.9.0, the Lib/test/multibytecodec_support.py CJK codec tests call eval() on content retrieved via HTTP.

## Affected

- `python >= 3.0.0, < 3.6.13`
- `python >= 3.7.0, < 3.7.10`
- `python >= 3.8.0, < 3.8.7`
- `python >= 3.9.0, < 3.9.1`
- `fedora = 33`
- `fedora = 34`
- `communications_cloud_native_core_network_function_cloud_native_environment = 22.2.0`

## Remediation

Upgrade past the affected range:

- `python 3.9.1`