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CVE-2026-55707

Incorrect authorization in OpenStack Neutron

CVSS score

7.1

EPSS probability

%0.4

Risk score

0.0

Published

2 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
A patch is available only for some products or versions

Kanıt listesindeki ürün ve sürüm eşleşmesini kontrol edin; bazı varyantlar hâlâ etkileniyor olabilir.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-55707 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-55707 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1openstackNeutron View
2debianneutron (sid) View
3debianneutron (forky) View
4debianneutron (trixie) View
5debianneutron (bookworm) View
6debianneutron (bullseye) View
Total affected vendors: 2|Products: 6

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
7.1CVSS V4_0HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:NCVE CNA
7.1CVSS V40HIGHCVSS: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:XNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Partial patch

2 düzeltme kanıtı bulundu; en az 3 ürün veya sürüm hâlâ etkileniyor ya da inceleniyor.

debianneutron (sid)2:28.0.1-2

Debian sid: 2:28.0.1-2

debianneutron (forky)2:28.0.1-2

Debian forky: 2:28.0.1-2

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-55707 is associated with the following CWEs:

CWE-863: Common Weakness Enumeration Entry CWE-863

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-55707 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsLow
UserGerekmiyor

Official Sources and Advisories

https://launchpad.net/bugs/2152113vendor-advisoryhttps://security.openstack.org/ossa/OSSA-2026-032.htmlvendor-advisoryhttps://www.openwall.com/lists/oss-security/2026/07/29/5vendor-advisoryhttp://www.openwall.com/lists/oss-security/2026/07/29/5nvdhttps://lists.debian.org/debian-lts-announce/2026/08/msg00024.htmlnvdhttps://security-tracker.debian.org/tracker/CVE-2026-55707vendor-advisory

CVSS Vector Radar Chart

7.1 / 10
Attack VectorNetworkComplexityLowPrivilegesLowUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityLow

Vulnerability Scoring Details

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
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow privileges
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)Low

Kısmi yama

2 düzeltme kanıtı bulundu; en az 3 ürün veya sürüm hâlâ etkileniyor ya da inceleniyor.

Follow the vendor

O
openstack logo
openstack
D
debian logo
debian

Weakness Type (CWE & CAPEC)

CWE-863

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