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CVE-2026-103621

Estado: AnalizadaMedia (4.3)—

Integer overflow in Compositing in Google Chrome prior to 154.0.8037.97 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)

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.

UI:R indica interacción del usuario (abrir página HTML preparada). Integer overflow en Chromium permite fuga de datos entre orígenes, clasificado como lectura de información (T1005) en navegador.

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

Application Isolation and SandboxingExploit ProtectionUpdate SoftwareData Loss Prevention

Tecnologías afectadas (1)

Google — Chrome

CWE

Referencias

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{
  "id": "CVE-2026-103621",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
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        "ssvcData": {
          "id": "CVE-2026-103621",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-10-03T15:42:01.325663Z"
        }
      }
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "chrome-cve-admin@google.com",
      "affectedData": [
        {
          "vendor": "Google",
          "product": "Chrome",
          "versions": [
            {
              "status": "affected",
              "version": "154.0.8037.97",
              "lessThan": "154.0.8037.97",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-10-02T16:16:43.180",
  "references": [
    {
      "url": "https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop.html",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "source": "chrome-cve-admin@google.com"
    },
    {
      "url": "https://issues.chromium.org/issues/556268833",
      "tags": [
        "Permissions Required"
      ],
      "source": "chrome-cve-admin@google.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Secondary",
      "source": "chrome-cve-admin@google.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Integer overflow in Compositing in Google Chrome prior to 154.0.8037.97 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)"
    }
  ],
  "lastModified": "2026-10-05T15:05:56.107",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndExcluding": "154.0.8037.97"
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          "operator": "OR"
        }
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  ],
  "sourceIdentifier": "chrome-cve-admin@google.com"
}