FKIE_CVE-2026-43001

Vulnerability from fkie_nvd - Published: 2026-05-01 09:16 - Updated: 2026-06-17 10:48
Severity
7.9 (High) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L
8.0 (High) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Summary
An issue was discovered in OpenStack Keystone before 29.0.2. POST /v3/credentials did not validate that the caller-supplied project_id for an EC2-type credential matched the project of the authenticating application credential. This allowed an attacker holding an unrestricted application credential for project A to create an EC2 credential targeting project B; a subsequent /v3/ec2tokens exchange would then issue a Keystone token scoped to project B while still carrying the original app_cred_id, enabling cross-project lateral movement within the credential owner's role footprint.
References
cve@mitre.orghttps://bugs.launchpad.net/keystone/+bug/2149775Exploit, Issue Tracking, Patch, Third Party Advisory
cve@mitre.orghttps://review.opendev.org/c/openstack/keystone/+/985804Patch
cve@mitre.orghttps://security.openstack.org/ossa/OSSA-2026-015.htmlPatch, Vendor Advisory
Impacted products
Vendor Product Version
openstack keystone *
openstack keystone *
openstack keystone *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Keystone",
          "vendor": "OpenStack",
          "versions": [
            {
              "lessThan": "27.0.2",
              "status": "affected",
              "version": "14.0.0",
              "versionType": "semver"
            },
            {
              "lessThan": "28.0.2",
              "status": "affected",
              "version": "28.0.0",
              "versionType": "semver"
            },
            {
              "lessThan": "29.0.2",
              "status": "affected",
              "version": "29.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "541F5133-3C0B-4973-BEDC-1A7D4BA292CA",
              "versionEndExcluding": "27.0.2",
              "versionStartIncluding": "14.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EE1CC117-FDCA-493D-B811-57BC9ADC9260",
              "versionEndExcluding": "28.0.2",
              "versionStartIncluding": "28.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "594C43ED-BCAE-43C2-9B5F-5D4AF2F2AC08",
              "versionEndExcluding": "29.0.2",
              "versionStartIncluding": "29.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in OpenStack Keystone before 29.0.2. POST /v3/credentials did not validate that the caller-supplied project_id for an EC2-type credential matched the project of the authenticating application credential. This allowed an attacker holding an unrestricted application credential for project A to create an EC2 credential targeting project B; a subsequent /v3/ec2tokens exchange would then issue a Keystone token scoped to project B while still carrying the original app_cred_id, enabling cross-project lateral movement within the credential owner\u0027s role footprint."
    }
  ],
  "id": "CVE-2026-43001",
  "lastModified": "2026-06-17T10:48:44.513",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 7.9,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.3,
        "impactScore": 6.0,
        "source": "cve@mitre.org",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.0,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.3,
        "impactScore": 6.0,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-43001",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-01T13:28:01.589906Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-01T09:16:17.273",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://bugs.launchpad.net/keystone/+bug/2149775"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch"
      ],
      "url": "https://review.opendev.org/c/openstack/keystone/+/985804"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://security.openstack.org/ossa/OSSA-2026-015.html"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "cve@mitre.org",
      "type": "Secondary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.