---
id: CVE-2017-16239
aliases:
  - GHSA-w2wf-cgwh-vpqg
  - PYSEC-2026-694
title: OpenStack Nova Filter Scheduler Bypass
summary: OpenStack Nova Filter Scheduler Bypass
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N'
vendor: nova
product: nova
ecosystem: pip
affected:
  - 'nova >= 16.0.0, < 16.0.3'
  - 'nova >= 15.0.0, < 15.0.8'
  - 'nova >= 14.0.0, < 14.0.10'
patched:
  - nova 16.0.3
  - nova 15.0.8
  - nova 14.0.10
published: '2022-05-13'
updated: '2026-07-06'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-w2wf-cgwh-vpqg'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2017-16239'
  - url: >-
      https://github.com/openstack/nova/commit/698b261a5a2a6c0f31ef5059046ef7196d5cba30
  - url: >-
      https://github.com/openstack/nova/commit/984dd8ad6add4523d93c7ce5a666a32233e02e34
  - url: >-
      https://github.com/openstack/nova/commit/9e2d63da94db63d97bd02e373bfc53d95808b833
  - url: >-
      https://github.com/openstack/nova/commit/b72105c1c49fcddc94992af63fc2f8078023491a
  - url: 'https://access.redhat.com/errata/RHSA-2018:0241'
  - url: 'https://access.redhat.com/errata/RHSA-2018:0314'
  - url: 'https://access.redhat.com/errata/RHSA-2018:0369'
  - url: 'https://github.com/openstack/nova'
  - url: 'https://launchpad.net/bugs/1664931'
  - url: 'https://security.openstack.org/ossa/OSSA-2017-005.html'
  - url: 'https://www.debian.org/security/2017/dsa-4056'
  - url: 'http://www.securityfocus.com/bid/101950'
tags:
  - osv
  - pip
epss: 0.01389
epssPercentile: 0.70683
ingestedAt: '2026-07-08T18:25:53.524Z'
---

## Overview

In OpenStack Nova through 14.0.9, 15.x through 15.0.7, and 16.x through 16.0.2, by rebuilding an instance, an authenticated user may be able to circumvent the Filter Scheduler bypassing imposed filters (for example, the ImagePropertiesFilter or the IsolatedHostsFilter). All setups using Nova Filter Scheduler are affected. Because of the regression described in Launchpad Bug #1732947, the preferred fix is a 14.x version after 14.0.10, a 15.x version after 15.0.8, or a 16.x version after 16.0.3.

## Affected packages

- `nova >= 16.0.0, < 16.0.3`
- `nova >= 15.0.0, < 15.0.8`
- `nova >= 14.0.0, < 14.0.10`

## Remediation

Upgrade to a patched release:

- `nova 16.0.3`
- `nova 15.0.8`
- `nova 14.0.10`