{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-40189","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-09T20:59:17.620Z","datePublished":"2026-04-10T19:44:54.672Z","dateUpdated":"2026-04-13T20:53:02.400Z"},"containers":{"cna":{"title":"goshs has a file-based ACL authorization bypass in goshs state-changing routes","problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":9.3,"baseSeverity":"CRITICAL","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/patrickhener/goshs/security/advisories/GHSA-wvhv-qcqf-f3cx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/patrickhener/goshs/security/advisories/GHSA-wvhv-qcqf-f3cx"},{"name":"https://github.com/patrickhener/goshs/commit/f212c4f4a126556bab008f79758e21a839ef2c0f","tags":["x_refsource_MISC"],"url":"https://github.com/patrickhener/goshs/commit/f212c4f4a126556bab008f79758e21a839ef2c0f"},{"name":"https://github.com/patrickhener/goshs/releases/tag/v2.0.0-beta.4","tags":["x_refsource_MISC"],"url":"https://github.com/patrickhener/goshs/releases/tag/v2.0.0-beta.4"}],"affected":[{"vendor":"patrickhener","product":"goshs","versions":[{"version":"< 2.0.0-beta.4","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-04-10T19:44:54.672Z"},"descriptions":[{"lang":"en","value":"goshs is a SimpleHTTPServer written in Go. Prior to 2.0.0-beta.4, goshs enforces the documented per-folder .goshs ACL/basic-auth mechanism for directory listings and file reads, but it does not enforce the same authorization checks for state-changing routes. An unauthenticated attacker can upload files with PUT, upload files with multipart POST /upload, create directories with ?mkdir, and delete files with ?delete inside a .goshs-protected directory. By deleting the .goshs file itself, the attacker can remove the folder's auth policy and then access previously protected content without credentials. This results in a critical authorization bypass affecting confidentiality, integrity, and availability. This vulnerability is fixed in 2.0.0-beta.4."}],"source":{"advisory":"GHSA-wvhv-qcqf-f3cx","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/patrickhener/goshs/security/advisories/GHSA-wvhv-qcqf-f3cx","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-13T20:52:58.640099Z","id":"CVE-2026-40189","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-13T20:53:02.400Z"}}]}}