{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-86411",
        "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "state": "PUBLISHED",
        "assignerShortName": "curl",
        "dateReserved": "2026-09-07T12:11:48.560Z",
        "datePublished": "2026-10-20T20:02:03.431Z",
        "dateUpdated": "2026-10-29T18:42:03.095Z"
    },
    "containers": {
        "cna": {
            "title": "FTP connection reuse inherits client-certificate",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "providerMetadata": {
                "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
                "shortName": "curl",
                "dateUpdated": "2026-10-20T20:02:03.431Z"
            },
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "CWE-488 Exposure of Data Element to Wrong Session"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "curl",
                    "product": "curl",
                    "versions": [
                        {
                            "version": "8.21.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.21.0",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "references": [
                {
                    "url": "https://curl.se/docs/CVE-2026-86411.json",
                    "name": "json"
                },
                {
                    "url": "https://curl.se/docs/CVE-2026-86411.html",
                    "name": "www"
                },
                {
                    "url": "https://hackerone.com/reports/3973190",
                    "name": "issue"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Stanislav Fort (Aisle Research)",
                    "type": "finder"
                },
                {
                    "lang": "en",
                    "value": "Stefan Eissing",
                    "type": "remediation developer"
                }
            ]
        },
        "adp": [
            {
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "type": "CWE",
                                "cweId": "CWE-488",
                                "lang": "en",
                                "description": "CWE-488 Exposure of Data Element to Wrong Session"
                            }
                        ]
                    }
                ],
                "references": [
                    {
                        "url": "https://hackerone.com/reports/3973190",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 9.1,
                            "attackVector": "NETWORK",
                            "baseSeverity": "CRITICAL",
                            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                            "integrityImpact": "HIGH",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "NONE",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "HIGH"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-29T18:41:51.847885Z",
                                "id": "CVE-2026-86411",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-10-29T18:42:03.095Z"
                }
            }
        ]
    }
}