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CVE-2026-55707

Quick assessment

Affected
OpenStack Neutron
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenStack Neutron是OpenStack基金会开源的一个提供网络即服务的网络组件。 OpenStack Neutron 28.0.2之前版本存在授权问题漏洞，该漏洞源于subnetpool onboarding API未验证目标子网的所有权，可能导致经过身份验证的用户将另一个项目共享网络中的子网纳入自己的子网池，从而修改受害者的子网状态并改变受害者路由器的L3路由和地址范围行为。

CVSS 7.1 · High EPSS 0.43% · P34

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
OpenStack Neutron 14.0.0< 26.0.6 affected
27.0.0< 27.0.4 affected
28.0.0< 28.0.2 affected
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I. Basic Information for CVE-2026-55707

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
OpenStack Neutron 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenStack Neutron是OpenStack基金会开源的一个提供网络即服务的网络组件。 OpenStack Neutron 28.0.2之前版本存在授权问题漏洞，该漏洞源于subnetpool onboarding API未验证目标子网的所有权，可能导致经过身份验证的用户将另一个项目共享网络中的子网纳入自己的子网池，从而修改受害者的子网状态并改变受害者路由器的L3路由和地址范围行为。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenStack Neutron 14.0.0 ~ 26.0.6 -

II. Public POCs for CVE-2026-55707

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III. Intelligence Information for CVE-2026-55707

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Vendor Advisories for CVE-2026-55707 (2)

Mailing List Discussions for CVE-2026-55707 (1)

Same Patch Batch · OpenStack · 2026-08-05 · 5 CVEs total

CVE-2026-71190 8.7 HIGH OpenStack Swift 资源管理错误漏洞
CVE-2026-71191 6.0 MEDIUM OpenStack Swift 授权问题漏洞
CVE-2026-71192 6.0 MEDIUM OpenStack Swift 授权问题漏洞
CVE-2026-71201 5.0 MEDIUM OpenStack ironic 授权问题漏洞

IV. Related Vulnerabilities

Same product: Neutron
Same vendor: OpenStack
Same weakness: CWE-863

V. Comments for CVE-2026-55707

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