CVE-2026-55707

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55707
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-05 06:16:37 UTC
Updated2026-08-12 20:17:45 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v4.0 7.1 HIGH from [email protected]

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.004870000 probability, percentile 0.396110000 (date 2026-08-13)

Problem Types: CWE-863 | CWE-863 CWE-863 Incorrect Authorization

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary7.1HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS7.1HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
None
Integrity
High
Availability
Low
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OpenStack Neutron affected 14.0.0 26.0.6 semver Not specified
CNA OpenStack Neutron affected 27.0.0 27.0.4 semver Not specified
CNA OpenStack Neutron affected 28.0.0 28.0.2 semver Not specified

References

ReferenceSourceLinkTags
security.openstack.org/ossa/OSSA-2026-032.html [email protected] security.openstack.org
launchpad.net/bugs/2152113 [email protected] launchpad.net
www.openwall.com/lists/oss-security/2026/07/29/5 [email protected] www.openwall.com
lists.debian.org/debian-lts-announce/2026/08/msg00024.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
www.openwall.com/lists/oss-security/2026/07/29/5 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
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