---
id: CVE-2013-1664
aliases:
  - GHSA-qrh7-x6fp-c2mp
  - PYSEC-2026-801
title: XML Entity Expansion (XEE) in Django
summary: XML Entity Expansion (XEE) in Django
severity: medium
vendor: django
product: django
ecosystem: pip
affected:
  - 'django >= 1.3.0, < 1.3.6'
  - 'django >= 1.4.0, < 1.4.4'
patched:
  - django 1.3.6
  - django 1.4.4
published: '2022-05-17'
updated: '2026-07-07'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-qrh7-x6fp-c2mp'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2013-1664'
  - url: >-
      https://github.com/django/django/commit/1c60d07ba23e0350351c278ad28d0bd5aa410b40
  - url: >-
      https://github.com/django/django/commit/d19a27066b2247102e65412aa66917aff0091112
  - url: 'https://bugs.launchpad.net/nova/+bug/1100282'
  - url: 'https://github.com/django/django'
  - url: 'http://blog.python.org/2013/02/announcing-defusedxml-fixes-for-xml.html'
  - url: 'http://bugs.python.org/issue17239'
  - url: >-
      http://lists.openstack.org/pipermail/openstack-announce/2013-February/000078.html
  - url: 'http://rhn.redhat.com/errata/RHSA-2013-0657.html'
  - url: 'http://rhn.redhat.com/errata/RHSA-2013-0658.html'
  - url: 'http://rhn.redhat.com/errata/RHSA-2013-0670.html'
  - url: 'http://ubuntu.com/usn/usn-1757-1'
  - url: 'http://www.openwall.com/lists/oss-security/2013/02/19/2'
  - url: 'http://www.openwall.com/lists/oss-security/2013/02/19/4'
tags:
  - osv
  - pip
epss: 0.04903
epssPercentile: 0.91716
ingestedAt: '2026-07-08T18:25:52.482Z'
---

## Overview

The XML libraries for Python, as used in OpenStack Keystone Essex, Folsom, and Grizzly; Compute (Nova) Essex and Folsom; Cinder Folsom; Django; and possibly other products allow remote attackers to cause a denial of service (resource consumption and crash) via an XML Entity Expansion (XEE) attack.

## Affected packages

- `django >= 1.3.0, < 1.3.6`
- `django >= 1.4.0, < 1.4.4`

## Remediation

Upgrade to a patched release:

- `django 1.3.6`
- `django 1.4.4`