CVE Feed

    Dashboard / CVE / CVE-2026-55707

    CVE-2026-55707

    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.

    Published:Jul 29, 2026
    Last Modified:Aug 12, 2026
    EPS:Aug 5, 2026
    EPSS Score:0.00487
    CVSS Score:7.1

    Affected Products

    Vendor
    Openstack
    Product
    Neutron

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-50266 (CVSS 2.2) — In OpenStack Neutron before 28.0.1, a project manager can create or update a port on a shared network owned by…
    CVE-2026-49299 (CVSS 5.3) — In OpenStack Neutron before 28.0.1, the tagging controller enforces plural policy action names on single-tag w…
    CVE-2024-53916 (CVSS 7.5) — In OpenStack Neutron before 25.0.1, neutron/extensions/tagging.py can use an incorrect ID during policy enforc…
    CVE-2022-3277 (CVSS 6.5) — An uncontrolled resource consumption flaw was found in openstack-neutron. This flaw allows a remote authentica…
    CVE-2021-40797 (CVSS 6.5) — An issue was discovered in the routes middleware in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 1…
    CVE-2021-40085 (CVSS 6.5) — An issue was discovered in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1. Authen…
    CVE-2021-38598 (CVSS 9.1) — OpenStack Neutron before 16.4.1, 17.x before 17.1.3, and 18.0.0 allows hardware address impersonation when the…
    CVE-2021-20267 (CVSS 7.1) — A flaw was found in openstack-neutron's default Open vSwitch firewall rules. By sending carefully crafted pack…
    CVE-2019-9735 (CVSS 6.5) — An issue was discovered in the iptables firewall module in OpenStack Neutron before 10.0.8, 11.x before 11.0.7…
    CVE-2019-10876 (CVSS 6.5) — An issue was discovered in OpenStack Neutron 11.x before 11.0.7, 12.x before 12.0.6, and 13.x before 13.0.3. B…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High