{"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": "2026-05-04T17:24:47.890Z"}, "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 \u2014 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"}}}}

{}

{"cveTags": [], "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 \u2014 bypassing network isolation (e.g. localhost, internal network). This issue has been patched in version 2.0.2."}], "id": "CVE-2026-42091", "lastModified": "2026-05-04T18:16:31.210", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-04T18:16:31.210", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/patrickhener/goshs/commit/0e715b94e10c3d1aa552276000f15f104dee2f32"}, {"source": "security-advisories@github.com", "url": "https://github.com/patrickhener/goshs/releases/tag/v2.0.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/patrickhener/goshs/security/advisories/GHSA-rhf7-wvw3-vjvm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-352"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.0.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "goshs", "source": "cna", "vendor": "patrickhener"}, "product": "goshs", "vendor": "patrickhener"}], "created": "2026-05-04T18:30:06.103716+00:00", "updated": "2026-05-04T19:00:07.682966+00:00", "vendors": ["patrickhener", "patrickhener$PRODUCT$goshs"]}