CVE-2021-40797

An issue was discovered in the routes middleware in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1. By making API requests involving nonexistent controllers, an authenticated user may cause the API worker to consume increasing amounts of memory, resulting in API performance degradation or denial of service.

• CWE-772

• http://www.openwall.com/lists/oss-security/2021/09/09/2Mailing List, Patch, Third Party Advisory
• https://launchpad.net/bugs/1942179Exploit, Issue Tracking, Third Party Advisory
• https://security.openstack.org/ossa/OSSA-2021-006.htmlPatch, Vendor Advisory
• http://www.openwall.com/lists/oss-security/2021/09/09/2Mailing List, Patch, Third Party Advisory
• https://launchpad.net/bugs/1942179Exploit, Issue Tracking, Third Party Advisory
• https://security.openstack.org/ossa/OSSA-2021-006.htmlPatch, Vendor Advisory

Published

Sep 8, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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