CVE-2026-58399

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{"affected": [{"affectedData": [{"product": "module-auth", "vendor": "antonio-castellon", "versions": [{"status": "affected", "version": "< 2.3.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "@acastellon/auth is an authentication control system for microservices. Versions prior to 2.3.0 appear to allow an unauthenticated authentication bypass in validateToken() through spoofable auth-user and Host request headers. The validateToken middleware contains a service-to-service bypass for auth-user: service-brother when req.get('host').startsWith(getHostName()). Both values involved in the check can be influenced by an unauthenticated HTTP client: auth-user is a request header, and Host is also client-controlled. As a result, a remote unauthenticated attacker can send a request with crafted headers and bypass token validation before the normal legacy/JWT/OIDC validation logic runs. A fix has been implemented in v2.3.0."}, {"lang": "es", "value": "@acastellon/auth es un sistema de control de autenticaci\u00f3n para microservicios. Las versiones anteriores a la 2.3.0 parecen permitir una omisi\u00f3n de autenticaci\u00f3n no autenticada en validateToken() a trav\u00e9s de encabezados de solicitud auth-user y Host falsificables. El middleware validateToken contiene una omisi\u00f3n de servicio a servicio para auth-user: service-brother cuando req.get(\u2019host\u2019).startsWith(getHostName()). Ambos valores involucrados en la verificaci\u00f3n pueden ser influenciados por un cliente HTTP no autenticado: auth-user es un encabezado de solicitud, y Host tambi\u00e9n es controlado por el cliente. Como resultado, un atacante remoto no autenticado puede enviar una solicitud con encabezados manipulados y omitir la validaci\u00f3n del token antes de que se ejecute la l\u00f3gica de validaci\u00f3n normal de legacy/JWT/OIDC. Se ha implementado una soluci\u00f3n en la v2.3.0."}], "id": "CVE-2026-58399", "lastModified": "2026-10-25T17:10:00.197", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "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:N/VI:H/VA:N/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": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-58399", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-07-02T14:25:47.187429Z", "version": "2.0.3"}}]}, "published": "2026-07-01T15:17:11.377", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/antonio-castellon/module-auth/issues/6"}, {"source": "security-advisories@github.com", "url": "https://github.com/antonio-castellon/module-auth/security/advisories/GHSA-gfj5-979r-92pw"}, {"source": "security-advisories@github.com", "url": "https://www.npmjs.com/package/@acastellon/auth/v/2.3.0"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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