« Volver al listado

CVE-2026-66299

Estado: AnalizadaMedia (5.3)—

Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example.

This issue affects Apache Tomcat: from 11.0.0-M20 through 11.0.24, from 10.1.24 through 10.1.57, from 9.0.89 through 9.0.120. Users who have followed the security guidance to remove the examples web application are not affected by this issue.

Users are recommended to remove the examples web application or to upgrade to version 11.0.25, 10.1.58 or 9.0.121 (when released), which fix the issue.

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)

Apache — Tomcat

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-66299",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-66299",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-07-28T17:39:48.240123Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@apache.org",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache Tomcat",
          "versions": [
            {
              "status": "affected",
              "version": "11.0.0-M20",
              "versionType": "semver",
              "lessThanOrEqual": "11.0.24"
            },
            {
              "status": "affected",
              "version": "10.1.24",
              "versionType": "semver",
              "lessThanOrEqual": "10.1.57"
            },
            {
              "status": "affected",
              "version": "9.0.89",
              "versionType": "semver",
              "lessThanOrEqual": "9.0.120"
            },
            {
              "status": "unaffected",
              "version": "0",
              "versionType": "semver",
              "lessThanOrEqual": "8.5.100"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-07-28T15:17:50.210",
  "references": [
    {
      "url": "https://lists.apache.org/thread/8owczcc1o8qw1rxmg9gvfk4w2jnh4l5k",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
      "source": "security@apache.org"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/07/28/25",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@apache.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Uncontrolled Resource Consumption vulnerability in Apache Tomcat's WebSocket chat example.\n\nThis issue affects Apache Tomcat: from 11.0.0-M20 through 11.0.24, from 10.1.24 through 10.1.57, from 9.0.89 through 9.0.120. Users who have followed the security guidance to remove the examples web application are not affected by this issue.\n\nUsers are recommended to remove the examples web application or to upgrade to version 11.0.25, 10.1.58 or 9.0.121 (when released), which fix the issue."
    }
  ],
  "lastModified": "2026-08-27T16:24:41.670",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4B8784DF-337E-4955-B7B4-B352E17A51D3",
              "versionEndExcluding": "9.0.121",
              "versionStartIncluding": "9.0.89"
            },
            {
              "criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "603322DF-B852-4112-A8E7-0447A122A894",
              "versionEndExcluding": "10.1.58",
              "versionStartIncluding": "10.1.24"
            },
            {
              "criteria": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DF30E912-1C80-4AEA-8C14-BB32B416EFEA",
              "versionEndExcluding": "11.0.25",
              "versionStartIncluding": "11.0.1"
            },
            {
              "criteria": "cpe:2.3:a:apache:tomcat:11.0.0:milestone20:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "77BA6600-0890-4BA1-B447-EC1746BAB4FD"
            },
            {
              "criteria": "cpe:2.3:a:apache:tomcat:11.0.0:milestone21:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7914D26B-CBD6-4846-9BD3-403708D69319"
            },
            {
              "criteria": "cpe:2.3:a:apache:tomcat:11.0.0:milestone22:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "123C6285-03BE-49FC-B821-8BDB25D02863"
            },
            {
              "criteria": "cpe:2.3:a:apache:tomcat:11.0.0:milestone23:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8A28C2E2-B7BC-46CE-94E4-AE3EF172AA47"
            },
            {
              "criteria": "cpe:2.3:a:apache:tomcat:11.0.0:milestone24:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "069B0D8E-8223-4C4E-A834-C6235D6C3450"
            },
            {
              "criteria": "cpe:2.3:a:apache:tomcat:11.0.0:milestone25:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E6282085-5716-4874-B0B0-180ECDEE128F"
            },
            {
              "criteria": "cpe:2.3:a:apache:tomcat:11.0.0:milestone26:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "899B6FF0-8701-47E7-8EDA-428A6D48786D"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@apache.org"
}