{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-87861",
        "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "state": "PUBLISHED",
        "assignerShortName": "curl",
        "dateReserved": "2026-09-09T13:17:34.696Z",
        "datePublished": "2026-10-20T20:09:28.592Z",
        "dateUpdated": "2026-10-20T20:09:28.592Z"
    },
    "containers": {
        "cna": {
            "title": "cross-origin reuse of a Negotiate connection",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "When using ambient user credentials, an HTTP request directed to one origin\nmay be dispatched over a connection previously authenticated via Negotiate for\na different origin, leaving the request's intended credentials unused."
                }
            ],
            "providerMetadata": {
                "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
                "shortName": "curl",
                "dateUpdated": "2026-10-20T20:09:28.592Z"
            },
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "CWE-201 Information Exposure Through Sent Data"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "curl",
                    "product": "curl",
                    "versions": [
                        {
                            "version": "8.22.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.22.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.21.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.21.0",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "references": [
                {
                    "url": "https://curl.se/docs/CVE-2026-87861.json",
                    "name": "json"
                },
                {
                    "url": "https://curl.se/docs/CVE-2026-87861.html",
                    "name": "www"
                },
                {
                    "url": "https://hackerone.com/reports/3972094",
                    "name": "issue"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Axel Mierczuk",
                    "type": "finder"
                },
                {
                    "lang": "en",
                    "value": "Stefan Eissing",
                    "type": "remediation developer"
                }
            ]
        }
    }
}