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CVE-2026-56410

Estado: AnalizadaMedia (6.9)—

xmlwf in libexpat before 2.8.2 has an integer overflow in resolveSystemId.

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).

Tecnologías afectadas (1)

Libexpat Project — Libexpat

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-56410",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
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        "ssvcData": {
          "id": "CVE-2026-56410",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-06-22T15:56:48.331184Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "cve@mitre.org",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.9,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.5,
        "exploitabilityScore": 1.4
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "libexpat project",
          "product": "libexpat",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "2.8.2",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-06-21T16:16:28.360",
  "references": [
    {
      "url": "https://github.com/libexpat/libexpat/pull/1252",
      "tags": [
        "Patch",
        "Issue Tracking"
      ],
      "source": "cve@mitre.org"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cve@mitre.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "xmlwf in libexpat before 2.8.2 has an integer overflow in resolveSystemId."
    }
  ],
  "lastModified": "2026-06-23T16:18:16.427",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E3A57811-3797-4D35-A4AC-E1AB3CE6F1F3",
              "versionEndExcluding": "2.8.2"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}