{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "incident": {
    "id": "cve-2026-86411",
    "url": "https://cveboard.org/i/cve-2026-86411",
    "urlPt": "https://cveboard.org/pt/i/cve-2026-86411",
    "json": "https://cveboard.org/i/cve-2026-86411.json",
    "kind": "vuln",
    "live": true,
    "knownExploited": false,
    "severity": "critical",
    "title": "curl curl",
    "summary": "An `ftp://` transfer configured with `CURLUSESSL_NONE` can reuse a pooled FTP control connection that a previous easy handle upgraded with `STARTTLS` and authenticated using a client certificate.",
    "titlePt": "curl curl",
    "summaryPt": "Uma transferência `ftp://` configurada com `CURLUSESSL_NONE` pode reutilizar uma conexão de controle FTP em pool que um manipulador fácil anterior atualizou com `STARTTLS` e autenticou usando um certificado de cliente.",
    "affected": [
      {
        "vendor": "curl",
        "product": "curl",
        "defaultStatus": "unaffected",
        "versions": [
          {
            "version": "8.21.0",
            "status": "affected",
            "lessThan": null,
            "lessThanOrEqual": "8.21.0"
          }
        ],
        "omitted": 0,
        "fixed": []
      }
    ],
    "omitted": 0,
    "references": [
      {
        "url": "https://hackerone.com/reports/3973190",
        "tag": "exploit"
      }
    ],
    "cwes": [
      {
        "id": "CWE-488",
        "name": "Exposure of Data Element to Wrong Session"
      }
    ],
    "ssvc": {
      "exploitation": "poc",
      "automatable": "no",
      "impact": "total",
      "at": "2026-10-29T18:41:51.847Z"
    },
    "fix": "none",
    "tags": [
      "curl"
    ],
    "description": "An `ftp://` transfer configured with `CURLUSESSL_NONE` can reuse a pooled FTP\ncontrol connection that a previous easy handle upgraded with `STARTTLS` and\nauthenticated using a client certificate. The second handle performs neither a\nnew TLS handshake nor a new FTP login, so the server continues to authorize it\nunder the first handle's certificate identity.",
    "descriptionFrom": "cve",
    "descriptionAt": null,
    "summaryFrom": "cve",
    "cves": [
      "CVE-2026-86411"
    ],
    "ghsa": null,
    "cvss": {
      "score": 9.1,
      "version": "3.1",
      "by": "CISA-ADP"
    },
    "epss": {
      "percentage": 0.00153,
      "percentile": 0.04389,
      "asOf": "2026-10-29",
      "by": "FIRST"
    },
    "packages": [],
    "vendor": "curl",
    "product": "curl",
    "kev": null,
    "breach": null,
    "retracted": false,
    "sources": [
      {
        "label": "cve.now",
        "url": "https://cve.now/CVE-2026-86411"
      }
    ],
    "cveVersion": 1,
    "cvePending": false,
    "publishedAt": "2026-10-20T20:02:03.431Z",
    "updatedAt": "2026-10-20T20:02:03.431Z"
  },
  "live": true,
  "events": [
    {
      "id": "cvenow:CVE-2026-86411:cvenow_discovered:first",
      "incidentId": "cve-2026-86411",
      "type": "cvenow_discovered",
      "at": "2026-10-20T20:02:03.431Z",
      "detail": {}
    }
  ]
}