7.1High
CVE-2026-55707
Description
In OpenStack Neutron before 28.0.2, the subnetpool onboarding API does not verify ownership of the target subnets. An authenticated user can onboard subnets from another project's shared network into their own subnetpool, mutating the victim's subnet state and altering L3 routing and address scope behavior for victim routers.
Weakness (CWE):
CWE-863
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
References and patches
- https://launchpad.net/bugs/2152113 issue-tracking
- https://security.openstack.org/ossa/OSSA-2026-032.html vendor-advisory
- https://www.openwall.com/lists/oss-security/2026/07/29/5 vendor-advisorymailing-list
- http://www.openwall.com/lists/oss-security/2026/07/29/5
- https://lists.debian.org/debian-lts-announce/2026/08/msg00024.html