{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-58399", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-30T18:19:58.378Z", "datePublished": "2026-07-01T14:25:44.452Z", "dateUpdated": "2026-07-01T14:25:44.452Z"}, "containers": {"cna": {"title": "@acastellon/auth has an authentication bypass via spoofable headers in validateToken()", "problemTypes": [{"descriptions": [{"cweId": "CWE-287", "lang": "en", "description": "CWE-287: Improper Authentication", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.7, "baseSeverity": "HIGH", "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", "version": "4.0"}}], "references": [{"name": "https://github.com/antonio-castellon/module-auth/security/advisories/GHSA-gfj5-979r-92pw", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/antonio-castellon/module-auth/security/advisories/GHSA-gfj5-979r-92pw"}, {"name": "https://github.com/antonio-castellon/module-auth/issues/6", "tags": ["x_refsource_MISC"], "url": "https://github.com/antonio-castellon/module-auth/issues/6"}, {"name": "https://www.npmjs.com/package/@acastellon/auth/v/2.3.0", "tags": ["x_refsource_MISC"], "url": "https://www.npmjs.com/package/@acastellon/auth/v/2.3.0"}], "affected": [{"vendor": "antonio-castellon", "product": "module-auth", "versions": [{"version": "< 2.3.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-01T14:25:44.452Z"}, "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."}], "source": {"advisory": "GHSA-gfj5-979r-92pw", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{}