{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-42091",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-04-23T19:17:30.566Z",
        "datePublished": "2026-05-04T17:24:47.890Z",
        "dateUpdated": "2026-05-05T14:14:46.121Z"
    },
    "containers": {
        "cna": {
            "title": "goshs has Cross-Origin Arbitrary File Write via Missing CSRF on PUT and Wildcard CORS",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-352",
                            "lang": "en",
                            "description": "CWE-352: Cross-Site Request Forgery (CSRF)",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/patrickhener/goshs/security/advisories/GHSA-rhf7-wvw3-vjvm",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/patrickhener/goshs/security/advisories/GHSA-rhf7-wvw3-vjvm"
                },
                {
                    "name": "https://github.com/patrickhener/goshs/commit/0e715b94e10c3d1aa552276000f15f104dee2f32",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/patrickhener/goshs/commit/0e715b94e10c3d1aa552276000f15f104dee2f32"
                },
                {
                    "name": "https://github.com/patrickhener/goshs/releases/tag/v2.0.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/patrickhener/goshs/releases/tag/v2.0.2"
                }
            ],
            "affected": [
                {
                    "vendor": "patrickhener",
                    "product": "goshs",
                    "versions": [
                        {
                            "version": "< 2.0.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-05-04T17:24:47.890Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "goshs is a SimpleHTTPServer written in Go. Prior to version 2.0.2, the PUT upload handler (httpserver/updown.go) lacks the CSRF token validation that was added to the POST upload handler during the CVE-2026-40883 fix. Combined with the unconditional Access-Control-Allow-Origin: * on the OPTIONS preflight handler (httpserver/server.go), any website can write arbitrary files to a goshs instance through the victim's browser — bypassing network isolation (e.g. localhost, internal network). This issue has been patched in version 2.0.2."
                }
            ],
            "source": {
                "advisory": "GHSA-rhf7-wvw3-vjvm",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/patrickhener/goshs/security/advisories/GHSA-rhf7-wvw3-vjvm",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-05-05T13:07:28.351435Z",
                                "id": "CVE-2026-42091",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-05-05T14:14:46.121Z"
                }
            }
        ]
    }
}