How severe is CVE-2015-8914?

CVE-2015-8914 has a CVSS score of 9.1/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2015-8914?

CVE-2015-8914 affects the following packages: neutron (PyPI), neutron (PyPI). Ecosystems affected: PyPI.

How do I fix CVE-2015-8914?

Update neutron to 7.0.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2015-8914 is resolved across your whole dependency graph.

How do I detect CVE-2015-8914 in my PyPI dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for neutron, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2015-8914 if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Is CVE-2015-8914 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2015-8914, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2015-8914?

CVE-2015-8914 has an EPSS (Exploit Prediction Scoring System) score of 4.3%, placing it in the 91th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2015-8914?

CVE-2015-8914 is classified as CWE-254 (CWE-254). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2015-8914 published, and has it been updated?

CVE-2015-8914 was published on June 17, 2016 and was last updated on June 29, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐍

🐍 PyPI

Not in CISA KEV

CRITICAL severity

CVE-2015-8914 — neutron

CRITICAL

CVE-2015-8914 is a critical-severity (CVSS 9.1) CWE-254 vulnerability in neutron. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for neutron — see the affected versions and patch details below.

OpenStack Neutron allows remote attackers to bypass an intended ICMPv6-spoofing protection mechanism

Also known asGHSA-3vj4-cvjp-482hPYSEC-2026-431

Published

Jun 17, 2016

Updated

Jun 29, 2026

Affected

2 pkgs

Patched

2 / 2

Exploits

1 known

Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

4.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs91th percentile — riskier than 91% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected

🐍neutron🐍neutron

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

The IPTables firewall in OpenStack Neutron before 7.0.4 and 8.0.0 through 8.1.0 allows remote attackers to bypass an intended ICMPv6-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via a link-local source address.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`neutron`	all versions	7.0.5`pip install --upgrade 'neutron==7.0.5'`
🐍PyPI	`neutron`	≥ 8.0.0&&< 8.1.1	8.1.1`pip install --upgrade 'neutron==8.1.1'`

Affected Products

1 product · 2 configurations

Application

neutronopenstack

≥ 8.0.0 && ≤ 8.1.0

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

The IPTables firewall in OpenStack Neutron before 7.0.4 and 8.0.0 throug…

bugs.launchpad.netNVDOct 2018

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for neutron, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update neutron to 7.0.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2015-8914 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatLow

Product	Fixed in	Advisory
Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7	`openstack-neutron-0:2015.1.4-2.el7ost`	RHSA-2016:1474
Red Hat OpenStack Platform 8.0 (Liberty)	`openstack-neutron-1:7.0.4-11.el7ost`	RHSA-2016:1473

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2015-8914 in your dependencies?

Find it across PyPI, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

9.1/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Raw vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CWE Classification

CWE-254CWE-254

Weaponization

No Nuclei template or Metasploit module yet. 1 public proof-of-concept reference is listed on this page.

OpenSSF Scorecard

Package health score

neutron

3.2/10

Code-Review0/10

Maintained10/10

Branch-Protection0/10

Assessed Oct 19, 2026

Timeline

Disclosed

Jun 17, 2016

First exploit

Oct 19, 2018

Last updated

Jun 29, 2026

Identifiers

CVE-2015-8914

GHSA-3vj4-cvjp-482h

PYSEC-2026-431

References

Advisoryopenwall.com Advisoryopenwall.com Advisoryaccess.redhat.com · RHSA 2016:1473 Advisoryaccess.redhat.com · RHSA 2016:1474 Advisorybugs.launchpad.net Advisoryreview.openstack.org Advisoryreview.openstack.org Advisoryreview.openstack.org Advisorysecurity.openstack.org · OSSA 2016 009 Advisorynvd.nist.gov · CVE 2015 8914 Webreview.openstack.org Webreview.openstack.org Webreview.openstack.org Packagegithub.com · neutron

Related vulnerabilities

This CVE is critical severity — higher than any of the other 8 CVEs affecting neutron (highest there: high).

CVE-2026-50266CVE-2026-49299CVE-2024-53916CVE-2023-3637CVE-2022-3277CVE-2021-40797CVE-2021-40085CVE-2021-38598

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedJun 29, 2026

CVE-2015-8914 — neutron

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Fixing This On Your OS

Frequently Asked Questions

Is CVE-2015-8914 in your dependencies?