---
id: CVE-2013-4179
aliases:
  - GHSA-j6xh-q826-55jw
  - PYSEC-2026-875
title: >-
  OpenStack Compute (Nova) vulnerable to denial of service via XML Entity
  Expansion attack
summary: >-
  OpenStack Compute (Nova) vulnerable to denial of service via XML Entity
  Expansion attack
severity: medium
vendor: nova
product: nova
ecosystem: pip
affected:
  - nova < 2013.2
patched:
  - nova 2013.2
published: '2022-05-17'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:49:38.935217369Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-j6xh-q826-55jw'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2013-4179'
  - url: 'https://access.redhat.com/errata/RHSA-2013:1199'
  - url: 'https://access.redhat.com/security/cve/CVE-2013-4179'
  - url: 'https://bugs.launchpad.net/ossa/+bug/1190229'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=989707'
  - url: 'https://opendev.org/openstack/nova'
  - url: 'http://rhn.redhat.com/errata/RHSA-2013-1199.html'
  - url: 'http://www.ubuntu.com/usn/USN-2005-1'
tags:
  - osv
  - pip
epss: 0.02725
epssPercentile: 0.85413
ingestedAt: '2026-07-08T18:25:50.602Z'
---

## Overview

The security group extension in OpenStack Compute (Nova) Grizzly 2013.1.3, Havana before havana-3, and earlier allows remote attackers to cause a denial of service (resource consumption and crash) via an XML Entity Expansion (XEE) attack.  NOTE: this issue is due to an incomplete fix for CVE-2013-1664.

## Affected packages

- `nova < 2013.2`

## Remediation

Upgrade to a patched release:

- `nova 2013.2`