# CVE-2015-5240: PYSEC-2026-853 - OpenStack Neutron Race condition vulnerability

Source: https://junglewise.ai/threats/cve-2015-5240-openstack-neutron-race-condition-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-06  
License: CC BY 4.0 with a link back

CVE-2015-5240 · Severity: info · Published 2026-07-06

OpenStack Neutron Race condition vulnerability

Technologies: [neutron (PyPI)](https://junglewise.ai/threats/technologies/pypi-neutron). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2015-5240 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2015-5240 being exploited in the wild.

**How severe is CVE-2015-5240?** Informational severity, published 6 July 2026.

**Which products and versions are affected?** neutron (PyPI) ECOSYSTEM:introduced=0,fixed=7.0.0.

**Is there a fix for CVE-2015-5240?** Yes. neutron (PyPI): upgrade to 7.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2015-5240?** Check whether you run neutron (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- neutron (PyPI): upgrade to 7.0.0 or later

  ```sh
  pip install "neutron>=7.0.0"
  ```


## Affected products

- neutron (PyPI) ECOSYSTEM:introduced=0,fixed=7.0.0

## Identifiers

- CVE-2015-5240
- GHSA-hhpj-6pj7-wpx5
- PYSEC-2026-853

## Related threats

- [PYSEC-2026-1693 - OpenStack Neutron can use an incorrect ID during policy enforcement](https://junglewise.ai/threats/cve-2024-53916-openstack-neutron-can-use-an-incorrect-id-during-policy)
- [PYSEC-2026-1694 - Denial of service in neutron](https://junglewise.ai/threats/cve-2023-3637-denial-of-service-in-neutron)
- [PYSEC-2026-855 - openstack-neutron uncontrolled resource consumption flaw](https://junglewise.ai/threats/cve-2022-3277-openstack-neutron-uncontrolled-resource-consumption-flaw)
- [PYSEC-2026-851 - OpenStack Neutron Improper Authentication vulnerability](https://junglewise.ai/threats/cve-2014-0056-openstack-neutron-improper-authentication-vulnerability)
- [PYSEC-2026-852 - OpenStack Neutron Intended MAC-spoofing protection mechanism bypass](https://junglewise.ai/threats/cve-2016-5363-openstack-neutron-intended-mac-spoofing-protection-mechanism)