CVE-2026-33551

{
  "id": "CVE-2026-33551",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-10T03:16:02.723",
  "lastModified": "2026-10-26T22:10:00.163",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in OpenStack Keystone 14 through 26 before 26.1.1, 27.0.0, 28.0.0, and 29.0.0. Restricted application credentials can create EC2 credentials. By using a restricted application credential to call the EC2 credential creation API, an authenticated user with only a reader role may obtain an EC2/S3 credential that carries the full set of the parent user's S3 permissions, effectively bypassing the role restrictions imposed on the application credential. Only deployments that use restricted application credentials in combination with the EC2/S3 compatibility API (swift3 / s3api) are affected."
    },
    {
      "lang": "es",
      "value": "Se descubrió un problema en OpenStack Keystone 14 hasta 26 antes de 26.1.1, 27.0.0, 28.0.0 y 29.0.0. Las credenciales de aplicación restringidas pueden crear credenciales EC2. Al usar una credencial de aplicación restringida para llamar a la API de creación de credenciales EC2, un usuario autenticado con solo un rol de lector puede obtener una credencial EC2/S3 que conlleva el conjunto completo de permisos S3 del usuario padre, eludiendo eficazmente las restricciones de rol impuestas a la credencial de aplicación. Solo se ven afectadas las implementaciones que usan credenciales de aplicación restringidas en combinación con la API de compatibilidad EC2/S3 (swift3 / s3api)."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "OpenStack",
          "product": "Keystone",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "14.0.0",
              "lessThan": "26.1.1",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "27.0.0",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "28.0.0",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "29.0.0",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N",
          "baseScore": 3.5,
          "baseSeverity": "LOW",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 1.4
      },
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-10T13:50:09.231560Z",
          "id": "CVE-2026-33551",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
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  "references": [
    {
      "url": "https://bugs.launchpad.net/keystone/+bug/2142138",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Issue Tracking"
      ]
    },
    {
      "url": "https://security.openstack.org/ossa/OSSA-2026-005.html",
      "source": "[email protected]",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/04/07/12",
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Patch",
        "Third Party Advisory"
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    },
    {
      "url": "https://bugs.launchpad.net/keystone/+bug/2142138",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Issue Tracking"
      ]
    }
  ]
}