Vulnerability-Lookup

GHSA-V5Q5-3VCQ-49R5

Vulnerability from github – Published: 2026-08-05 06:30 – Updated: 2026-08-12 21:31

Details

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.

Severity

7.1 (High)


                  
                    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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-55707"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-05T06:16:37Z",
    "severity": "HIGH"
  },
  "details": "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\u0027s shared network into their own subnetpool, mutating the victim\u0027s subnet state and altering L3 routing and address scope behavior for victim routers.",
  "id": "GHSA-v5q5-3vcq-49r5",
  "modified": "2026-08-12T21:31:16Z",
  "published": "2026-08-05T06:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55707"
    },
    {
      "type": "WEB",
      "url": "https://launchpad.net/bugs/2152113"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2026/08/msg00024.html"
    },
    {
      "type": "WEB",
      "url": "https://security.openstack.org/ossa/OSSA-2026-032.html"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2026/07/29/5"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/07/29/5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-55707 (GCVE-0-2026-55707)

Vulnerability from cvelistv5 – Published: 2026-08-05 04:44 – Updated: 2026-08-12 19:23

Summary

Severity

7.1 (High)


                        
                          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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-06 13:00 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

mitre CNA under the mitre root

CNA scorecard E 28/100 over 2319 records in the last 180 days details

References

5 references

URL	Tags
https://launchpad.net/bugs/2152113	issue-tracking
https://security.openstack.org/ossa/OSSA-2026-032.html	vendor-advisory
https://www.openwall.com/lists/oss-security/2026/…	vendor-advisorymailing-list
http://www.openwall.com/lists/oss-security/2026/07/29/5
https://lists.debian.org/debian-lts-announce/2026…

Impacted products

1 product

Vendor	Product	Version
OpenStack	Neutron	Affected: 14.0.0 , < 26.0.6 (semver) Affected: 27.0.0 , < 27.0.4 (semver) Affected: 28.0.0 , < 28.0.2 (semver) cpe:2.3:a:openstack:neutron:::::::: cpe:2.3:a:openstack:neutron:::::::: cpe:2.3:a:openstack:neutron::::::::

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JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-08-12T19:23:45.731Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/07/29/5"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2026/08/msg00024.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-55707",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-06T13:00:38.952377Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-06T13:00:54.698Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Neutron",
          "repo": "https://opendev.org/openstack/neutron",
          "vendor": "OpenStack",
          "versions": [
            {
              "lessThan": "26.0.6",
              "status": "affected",
              "version": "14.0.0",
              "versionType": "semver"
            },
            {
              "lessThan": "27.0.4",
              "status": "affected",
              "version": "27.0.0",
              "versionType": "semver"
            },
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              "lessThan": "28.0.2",
              "status": "affected",
              "version": "28.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
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                },
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                  "versionStartIncluding": "28.0.0",
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                }
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              "operator": "OR"
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          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
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            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
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            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
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            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
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          "scenarios": [
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        },
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          ],
          "url": "https://security.openstack.org/ossa/OSSA-2026-032.html"
        },
        {
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  "cveMetadata": {
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    "assignerShortName": "mitre",
    "cveId": "CVE-2026-55707",
    "datePublished": "2026-08-05T04:44:16.572Z",
    "dateReserved": "2026-06-17T01:24:38.456Z",
    "dateUpdated": "2026-08-12T19:23:45.731Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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