{"id":"EUVD-2026-27067","enisaUuid":"85080a51-aadf-3010-8644-a128003e9b9d","description":"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\u0027s browser — bypassing network isolation (e.g. localhost, internal network). This issue has been patched in version 2.0.2.","datePublished":"May 4, 2026, 5:24:47 PM","dateUpdated":"May 5, 2026, 2:14:46 PM","baseScore":6.5,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","references":"https://github.com/patrickhener/goshs/security/advisories/GHSA-rhf7-wvw3-vjvm\nhttps://github.com/patrickhener/goshs/commit/0e715b94e10c3d1aa552276000f15f104dee2f32\nhttps://github.com/patrickhener/goshs/releases/tag/v2.0.2\n","aliases":"CVE-2026-42091\n","assigner":"GitHub_M","epss":0.17,"enisaIdProduct":[{"id":"38e9a7e2-8908-32db-8a7c-4f81f449f129","product":{"name":"goshs","vendor":{"name":"patrickhener"}},"product_version":"\u003c 2.0.2"}],"enisaIdVendor":[{"id":"906bc532-c25d-363b-a967-76632b51ed77","vendor":{"name":"patrickhener"}}],"enisaIdVulnerability":[{"id":"d79fa723-1726-3498-9609-a663439a3260","vulnerability":{"id":"CVE-2026-42091","description":"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\u0027s browser — bypassing network isolation (e.g. localhost, internal network). This issue has been patched in version 2.0.2.","datePublished":"May 4, 2026, 5:24:47 PM","dateUpdated":"May 5, 2026, 2:14:46 PM","status":"PUBLISHED","baseScore":6.5,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","references":"https://github.com/patrickhener/goshs/security/advisories/GHSA-rhf7-wvw3-vjvm\nhttps://github.com/patrickhener/goshs/commit/0e715b94e10c3d1aa552276000f15f104dee2f32\nhttps://github.com/patrickhener/goshs/releases/tag/v2.0.2\n","enisa_id":"EUVD-2026-27067\n","assigner":"GitHub_M","epss":0.17,"dataProcessed":"Nov 7, 2026, 7:20:58 AM","vulnerabilityProduct":[{"id":"e035e199-e7a5-3cd4-97d0-a36cd835d696","product":{"name":"goshs","vendor":{"name":"patrickhener"}},"product_version":"\u003c 2.0.2"}],"vulnerabilityVendor":[{"id":"3e61407f-bbcc-36a1-9557-94352c14192c","vendor":{"name":"patrickhener"}}]}}],"enisaIdAdvisory":[]}