---
id: CVE-2023-3637
aliases:
  - GHSA-r3jh-qhgj-gvr8
  - PYSEC-2026-1694
title: Denial of service in neutron
summary: Denial of service in neutron
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
vendor: neutron
product: neutron
ecosystem: pip
affected:
  - neutron <= 22.0.2
published: '2023-07-25'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:50:02.577902185Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-r3jh-qhgj-gvr8'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2023-3637'
  - url: 'https://access.redhat.com/errata/RHSA-2023:4283'
  - url: 'https://access.redhat.com/security/cve/CVE-2023-3637'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2222270'
tags:
  - osv
  - pip
epss: 0.01305
epssPercentile: 0.69277
ingestedAt: '2026-07-08T18:25:52.638Z'
---

## Overview

An uncontrolled resource consumption flaw was found in openstack-neutron. This flaw allows a remote authenticated user to query a list of security groups for an invalid project. This issue creates resources that are unconstrained by the user's quota. If a malicious user were to submit a significant number of requests, this could lead to a denial of service.

## Affected packages

- `neutron <= 22.0.2`

## Remediation

Refer to the advisory for the patched release.