CVE-2026-40189

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{"affected": [{"affectedData": [{"product": "goshs", "vendor": "patrickhener", "versions": [{"status": "affected", "version": "< 2.0.0-beta.4"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:goshs:goshs:*:*:*:*:*:go:*:*", "matchCriteriaId": "471EA45E-3052-469D-B301-4D92FB187228", "versionEndExcluding": "2.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:goshs:goshs:2.0.0:beta1:*:*:*:go:*:*", "matchCriteriaId": "047ECFC3-056F-4FAC-9B64-5F7C120CFFE1", "vulnerable": true}, {"criteria": "cpe:2.3:a:goshs:goshs:2.0.0:beta2:*:*:*:go:*:*", "matchCriteriaId": "6EA86AD2-EE6D-4427-9434-A9A49A4D38F9", "vulnerable": true}, {"criteria": "cpe:2.3:a:goshs:goshs:2.0.0:beta3:*:*:*:go:*:*", "matchCriteriaId": "F44CF6A3-C1BC-4636-A1D5-1ED69A340FE3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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."}, {"lang": "es", "value": "goshs es un SimpleHTTPServer escrito en Go. Antes de la versi\u00f3n 2.0.0-beta.4, goshs aplica el mecanismo documentado de ACL/autenticaci\u00f3n b\u00e1sica .goshs por carpeta para listados de directorios y lecturas de archivos, pero no aplica las mismas comprobaciones de autorizaci\u00f3n para rutas que cambian el estado. Un atacante no autenticado puede subir archivos con PUT, subir archivos con POST multipart /upload, crear directorios con ?mkdir y eliminar archivos con ?delete dentro de un directorio protegido por .goshs. Al eliminar el propio archivo .goshs, el atacante puede eliminar la pol\u00edtica de autenticaci\u00f3n de la carpeta y luego acceder a contenido previamente protegido sin credenciales. Esto resulta en una omisi\u00f3n cr\u00edtica de autorizaci\u00f3n que afecta a la confidencialidad, integridad y disponibilidad. Esta vulnerabilidad se corrige en la versi\u00f3n 2.0.0-beta.4."}], "id": "CVE-2026-40189", "lastModified": "2026-10-26T22:10:00.163", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.3, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40189", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-13T20:52:58.640099Z", "version": "2.0.3"}}]}, "published": "2026-04-10T20:16:23.890", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/patrickhener/goshs/commit/f212c4f4a126556bab008f79758e21a839ef2c0f"}, {"source": "security-advisories@github.com", "tags": ["Product", "Release Notes"], "url": "https://github.com/patrickhener/goshs/releases/tag/v2.0.0-beta.4"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/patrickhener/goshs/security/advisories/GHSA-wvhv-qcqf-f3cx"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/patrickhener/goshs/security/advisories/GHSA-wvhv-qcqf-f3cx"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.0.0-beta.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "goshs", "source": "cna", "vendor": "patrickhener"}, "product": "goshs", "vendor": "patrickhener"}], "analysis": {"en": {"generated_at": "2026-04-14T21:35:26.693875+00:00", "value": {"mitigation_remediation": ["Upgrade goshs to version 2.0.0\u2011beta.4 or later, which restores ACL enforcement on state\u2011changing routes.", "Restrict external network access to the server by placing it behind a firewall or reverse proxy that enforces authentication.", "If the server has already been compromised, delete any .goshs directories that lack an ACL file and review the server\u2019s file system for unauthorized changes.", "Monitor the server for anomalous upload or delete activity and verify that the correct ACL files are present."], "summary": {"action": "Patch", "impact": "Authorization Bypass"}, "threat_synthesis": {"affected_systems": "Versions of goshs up to (but not including) 2.0.0\u2011beta.4 are affected. The vulnerability exists in the 2.0.0\u2011beta.1, beta.2, and beta.3 releases as well as any earlier build that did not implement the state\u2011changing route check. The product is the Go\u2011based SimpleHTTPServer known as goshs, maintained by the patrickhener project.", "description_and_impact": "An attacker can bypass directory protection by exploiting a flaw in the authorization checks applied to state\u2011changing routes in goshs. The server accepts PUT, multipart POST /upload, ?mkdir, and ?delete requests even from unauthenticated clients, allowing creation, modification, or deletion of files. Deleting the \".goshs\" ACL file removes the protected\u2011directory policy, granting full access to previously restricted content. This flaw results in a hard\u2011coded authorization bypass that can compromise confidentiality, integrity, and availability, and is classified under CWE\u2011862.", "risk_and_exploitability": "The CVSS base score of 9.3 reflects a high\u2011severity vulnerability. While the EPSS score is below 1\u202f%, indicating low current exploitation probability, the flaw is publicly documented and no mitigation exists other than updating. Because the attack path requires only unauthenticated HTTP requests to a reachable server, the risk to environments running vulnerable releases is substantial. Deployment of affected versions without proper firewalls or authentication proxies creates a straightforward surface for attackers to gain unauthorized file access or alter server state."}}}}, "created": "2026-04-13T12:42:39.325048+00:00", "updated": "2026-04-15T15:45:07.552537+00:00", "vendors": ["patrickhener", "patrickhener$PRODUCT$goshs"]}