AUGUST 16, 2026
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Case File

CVE-2026-55707

HIGH · CVSS 7.1 EPSS 0.49%

Source: NVD + CISA KEV + EPSS · Published 2026-08-05 · Last synced 2026-08-16

CyberRota Analysis

AI-Generated

OpenStack Neutron versions prior to 28.0.2 are vulnerable due to a flaw in the subnetpool onboarding API, which fails to verify the ownership of target subnets. This allows an authenticated user to onboard subnets from another project's shared network into their own subnetpool, potentially disrupting the victim's subnet state and affecting L3 routing and address scope behavior. Organizations using OpenStack Neutron should prioritize patching to mitigate the risk of unauthorized access and network disruption.

CVE
CVE-2026-55707
Severity
HIGH
CVSS
7.1
EPSS
0.49%

Original NVD 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.