{"id":"PYSEC-2026-879","summary":"OpenStack Nova Denial of Service in network source security groups","details":"Algorithmic complexity vulnerability in OpenStack Compute (Nova) before 2013.1.3 and Havana before havana-3 does not properly handle network source security group policy updates, which allows remote authenticated users to cause a denial of service (nova-network consumption) via a large number of server-creation operations, which triggers a large number of update requests.","aliases":["CVE-2013-4185","GHSA-ph2h-hh49-vh27"],"modified":"2026-07-07T11:45:49.061451474Z","published":"2026-07-06T08:03:23.117396Z","references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2013-4185"},{"type":"WEB","url":"https://bugs.launchpad.net/nova/+bug/1184041"},{"type":"PACKAGE","url":"https://github.com/openstack/nova"},{"type":"WEB","url":"http://github.com/openstack/nova/commit/52ad911963da4095b213952dee3a430fe0c4c30f"},{"type":"WEB","url":"http://github.com/openstack/nova/commit/85aac04704350566d6b06aa7a3b99649946c672c"},{"type":"WEB","url":"http://github.com/openstack/nova/commit/d4ee081c5c0a5132781235177c430ebcf72b0b0b"},{"type":"WEB","url":"http://rhn.redhat.com/errata/RHSA-2013-1199.html"},{"type":"WEB","url":"http://seclists.org/oss-sec/2013/q3/282"},{"type":"PACKAGE","url":"https://pypi.org/project/nova"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-ph2h-hh49-vh27"}],"affected":[{"package":{"name":"nova","ecosystem":"PyPI","purl":"pkg:pypi/nova"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.0.0a0"}]}],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/nova/PYSEC-2026-879.yaml"}}],"schema_version":"1.7.5"}