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CVE-2026-18255

Estado: Pendiente de análisisAlta (7.2)—

A flaw was found in Quay. A user configured in GLOBAL_READONLY_SUPER_USERS is able to view robot account tokens for repositories they are not a member of, allowing an attacker with read-only superuser privileges to impersonate any robot account.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Red sin requerir privilegios iniciales (AV:N); acceso con PR:H a tokens de robot account permite suplantación de identidad (T1078: uso válido de credenciales; T1098.002: control de cuenta de servicio).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-18255",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-18255",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-07-29T18:05:45.459458Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "secalert@redhat.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.2,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.2
      }
    ]
  },
  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "cpes": [
            "cpe:/a:redhat:quay:3.10::el8"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat Quay 3.10",
          "versions": [
            {
              "status": "unaffected",
              "version": "1788561841",
              "lessThan": "*",
              "versionType": "rpm"
            }
          ],
          "packageName": "quay/quay-rhel8",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "defaultStatus": "affected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:quay:3.12::el8"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat Quay 3.12",
          "versions": [
            {
              "status": "unaffected",
              "version": "1788594376",
              "lessThan": "*",
              "versionType": "rpm"
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          ],
          "packageName": "quay/quay-rhel8",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "defaultStatus": "affected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:quay:3.14::el8"
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          "vendor": "Red Hat",
          "product": "Red Hat Quay 3.14",
          "versions": [
            {
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              "version": "1788593843",
              "lessThan": "*",
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            }
          ],
          "packageName": "quay/quay-rhel8",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "defaultStatus": "affected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:quay:3.15::el8"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat Quay 3.15",
          "versions": [
            {
              "status": "unaffected",
              "version": "1788191755",
              "lessThan": "*",
              "versionType": "rpm"
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          ],
          "packageName": "quay/quay-rhel8",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "defaultStatus": "affected"
        },
        {
          "cpes": [
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          ],
          "vendor": "Red Hat",
          "product": "Red Hat Quay 3.16",
          "versions": [
            {
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              "version": "1789563753",
              "lessThan": "*",
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          ],
          "packageName": "quay/quay-rhel9",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "defaultStatus": "affected"
        },
        {
          "cpes": [
            "cpe:/a:redhat:quay:3.17::el9"
          ],
          "vendor": "Red Hat",
          "product": "Red Hat Quay 3.17",
          "versions": [
            {
              "status": "unaffected",
              "version": "1790690298",
              "lessThan": "*",
              "versionType": "rpm"
            }
          ],
          "packageName": "quay/quay-rhel9",
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "defaultStatus": "affected"
        },
        {
          "cpes": [
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          ],
          "vendor": "Red Hat",
          "product": "Red Hat Quay 3.9",
          "versions": [
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          "defaultStatus": "affected"
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  ],
  "published": "2026-07-29T17:16:51.393",
  "references": [
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:63307",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:65514",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:66084",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:66523",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:69255",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:70267",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:74511",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://access.redhat.com/security/cve/CVE-2026-18255",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2508454",
      "source": "secalert@redhat.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Quay. A user configured in GLOBAL_READONLY_SUPER_USERS is able to view robot account tokens for repositories they are not a member of, allowing an attacker with read-only superuser privileges to impersonate any robot account."
    }
  ],
  "lastModified": "2026-10-01T17:17:22.607",
  "sourceIdentifier": "secalert@redhat.com"
}