{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-87865",
        "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "state": "PUBLISHED",
        "assignerShortName": "curl",
        "dateReserved": "2026-09-09T13:17:41.347Z",
        "datePublished": "2026-10-20T20:15:13.165Z",
        "dateUpdated": "2026-10-20T20:15:13.165Z"
    },
    "containers": {
        "cna": {
            "title": "knownhost callback mismatches key as missing",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "When libcurl uses libssh2 with a hashed `known_hosts` file, an unrelated\ninitial entry can cause host key validation to report a key *mismatch* as a\n*missing* key to the `CURLOPT_SSH_KEYFUNCTION` callback."
                }
            ],
            "providerMetadata": {
                "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
                "shortName": "curl",
                "dateUpdated": "2026-10-20T20:15:13.165Z"
            },
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "CWE-295 Improper Certificate Validation"
                        }
                    ]
                }
            ],
            "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"
                        },
                        {
                            "version": "8.20.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.20.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.19.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.19.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.18.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.18.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.17.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.17.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.16.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.16.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.15.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.15.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.14.1",
                            "status": "affected",
                            "lessThanOrEqual": "8.14.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.14.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.14.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.13.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.13.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.12.1",
                            "status": "affected",
                            "lessThanOrEqual": "8.12.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.12.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.12.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.11.1",
                            "status": "affected",
                            "lessThanOrEqual": "8.11.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.11.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.11.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.10.1",
                            "status": "affected",
                            "lessThanOrEqual": "8.10.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.10.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.10.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.9.1",
                            "status": "affected",
                            "lessThanOrEqual": "8.9.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.9.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.9.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.8.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.8.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.7.1",
                            "status": "affected",
                            "lessThanOrEqual": "8.7.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.7.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.7.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.6.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.6.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.5.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.5.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.4.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.4.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.3.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.3.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.2.1",
                            "status": "affected",
                            "lessThanOrEqual": "8.2.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.2.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.2.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.1.2",
                            "status": "affected",
                            "lessThanOrEqual": "8.1.2",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.1.1",
                            "status": "affected",
                            "lessThanOrEqual": "8.1.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.1.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.1.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.0.1",
                            "status": "affected",
                            "lessThanOrEqual": "8.0.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "8.0.0",
                            "status": "affected",
                            "lessThanOrEqual": "8.0.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.88.1",
                            "status": "affected",
                            "lessThanOrEqual": "7.88.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.88.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.88.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.87.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.87.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.86.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.86.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.85.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.85.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.84.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.84.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.83.1",
                            "status": "affected",
                            "lessThanOrEqual": "7.83.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.83.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.83.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.82.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.82.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.81.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.81.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.80.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.80.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.79.1",
                            "status": "affected",
                            "lessThanOrEqual": "7.79.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.79.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.79.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.78.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.78.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.77.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.77.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.76.1",
                            "status": "affected",
                            "lessThanOrEqual": "7.76.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.76.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.76.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.75.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.75.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.74.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.74.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.73.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.73.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.72.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.72.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.71.1",
                            "status": "affected",
                            "lessThanOrEqual": "7.71.1",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.71.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.71.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.70.0",
                            "status": "affected",
                            "lessThanOrEqual": "7.70.0",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.69.1",
                            "status": "affected",
                            "lessThanOrEqual": "7.69.1",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "references": [
                {
                    "url": "https://curl.se/docs/CVE-2026-87865.json",
                    "name": "json"
                },
                {
                    "url": "https://curl.se/docs/CVE-2026-87865.html",
                    "name": "www"
                },
                {
                    "url": "https://hackerone.com/reports/3975408",
                    "name": "issue"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Bobbeh Rhino",
                    "type": "finder"
                },
                {
                    "lang": "en",
                    "value": "Bobbeh Rhino",
                    "type": "remediation developer"
                }
            ]
        }
    }
}