How severe is CVE-2019-10876?

CVE-2019-10876 has a CVSS score of 6.5/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2019-10876?

CVE-2019-10876 affects the following packages: neutron (PyPI), neutron (PyPI), neutron (PyPI). Ecosystems affected: PyPI.

How do I fix CVE-2019-10876?

Update neutron to 11.0.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-10876 is resolved across your whole dependency graph.

How do I detect CVE-2019-10876 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-2019-10876 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2019-10876 actively exploited in the wild?

No public exploit code has been indexed for CVE-2019-10876 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2019-10876?

CVE-2019-10876 has an EPSS (Exploit Prediction Scoring System) score of 1.7%, placing it in the 78th 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.

When was CVE-2019-10876 published, and has it been updated?

CVE-2019-10876 was published on April 5, 2019 and was last updated on October 24, 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

MEDIUM severity

CVE-2019-10876 — neutron

MEDIUM

CVE-2019-10876 is a medium-severity (CVSS 6.5) vulnerability in neutron. A fix is available for neutron — see the affected versions and patch details below.

OpenStack Neutron overlapping security group rules prevents compute node network configuration

Also known asGHSA-jr9m-v5qh-mh2jPYSEC-2019-189

Published

Apr 5, 2019

Updated

Oct 24, 2026

Affected

3 pkgs

Patched

3 / 3

Exploits

None indexed

Exploitation data as of Oct 30, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs78th percentile — riskier than 78% 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

3 pkgs affected

🐍neutron🐍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

An issue was discovered in OpenStack Neutron 11.x before 11.0.7, 12.x before 12.0.6, and 13.x before 13.0.3. By creating two security groups with separate/overlapping port ranges, an authenticated user may prevent Neutron from being able to configure networks on any compute nodes where those security groups are present, because of an Open vSwitch (OVS) firewall KeyError. All Neutron deployments utilizing neutron-openvswitch-agent are affected.

Affected Packages

3 total 3 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`neutron`	≥ 11.0.0&&< 11.0.7	11.0.7`pip install --upgrade 'neutron==11.0.7'`
🐍PyPI	`neutron`	≥ 12.0.0&&< 12.0.6	12.0.6`pip install --upgrade 'neutron==12.0.6'`
🐍PyPI	`neutron`	≥ 13.0.0&&< 13.0.3	13.0.3`pip install --upgrade 'neutron==13.0.3'`

Affected Products

2 products · 5 configurations

Application

neutronopenstack

≥ 13.0.0 && < 13.0.3

range

Application

openstackredhat

2 versions

1314

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 11.0.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-10876 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

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 HatModerate

The pre-requisites for this vulnerability are not in Red Hat OpenStack prior to version 11, hence these versions are not affected.

Product	Fixed in	Advisory
Red Hat OpenStack Platform 13.0 (Queens)	`openstack-neutron-1:12.0.5-11.el7ost`	RHSA-2019:0935
Red Hat OpenStack Platform 14.0 (Rocky)	`openstack-neutron-1:13.0.3-0.20190313155649.00b63be.el7ost`	RHSA-2019:0879

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2019-10876 in your dependencies?

Find it across PyPI, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

6.5/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Raw vector

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

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

OpenSSF Scorecard

Package health score

neutron

3.2/10

Code-Review0/10

Maintained10/10

Branch-Protection0/10

Assessed Oct 19, 2026

Timeline

Disclosed

Apr 5, 2019

Last updated

Oct 24, 2026

Identifiers

CVE-2019-10876

GHSA-jr9m-v5qh-mh2j

PYSEC-2019-189

References

Advisoryopenwall.com Advisoryaccess.redhat.com · RHSA 2019:0879 Advisoryaccess.redhat.com · RHSA 2019:0935 Advisoryreview.openstack.org Advisorysecurity.openstack.org · OSSA 2019 002 Advisorynvd.nist.gov · CVE 2019 10876 Reportbugs.launchpad.net Webgithub.com · PYSEC 2019 189.yaml Packagegithub.com · neutron

Related vulnerabilities

This CVE is medium severity; 7 of 8 other CVEs affecting neutron are rated as high or higher (top: 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 verifiedOct 24, 2026

CVE-2019-10876 — 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-2019-10876 in your dependencies?