CVE-2026-47769

{"id": "CVE-2026-47769", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-47769", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-23T18:14:31.043277Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "Work90210", "product": "APIFold", "versions": [{"status": "affected", "version": "< 7f19b52280f414f57af2b79a95333d1c8fbeece5"}]}]}], "published": "2026-07-23T18:16:53.920", "references": [{"url": "https://github.com/Work90210/APIFold/commit/7f19b52280f414f57af2b79a95333d1c8fbeece5", "source": "security-advisories@github.com"}, {"url": "https://github.com/Work90210/APIFold/pull/235", "source": "security-advisories@github.com"}, {"url": "https://github.com/Work90210/APIFold/security/advisories/GHSA-x82h-9r8v-m672", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-306"}]}], "descriptions": [{"lang": "en", "value": "APIFold reads an OpenAPI 3.x or Swagger 2.x specification and generates a live, production-ready MCP server endpoint. Prior to commit 7f19b52280f414f57af2b79a95333d1c8fbeece5, the `/webhooks/:serverSlug/:eventName` endpoint accepts arbitrary unauthenticated JSON and stores it in Redis and the `webhook_events` PostgreSQL table without any signature check or authentication requirement. The root cause is that `createWebhookRouter` is called at `server.ts:188` without a `validators` map, so `receivers.ts:80`'s optional-chaining guard evaluates to `undefined` and the signature-validation block (`receiver.ts:81\u201395`) is unconditionally skipped. Any unauthenticated network client that knows a valid server slug can inject arbitrary payloads, which are subsequently served as trusted resource state to legitimate MCP clients. Commit 7f19b52280f414f57af2b79a95333d1c8fbeece5 patches the issue."}, {"lang": "es", "value": "APIFold lee una especificaci\u00f3n OpenAPI 3.x o Swagger 2.x y genera un endpoint de servidor MCP en vivo y listo para producci\u00f3n. Antes del commit 7f19b52280f414f57af2b79a95333d1c8fbeece5, el endpoint \u201c/webhooks/:serverSlug/:eventName\u201d acepta JSON arbitrario no autenticado y lo almacena en Redis y en la tabla \u201cwebhook_events\u201d de PostgreSQL sin ninguna verificaci\u00f3n de firma o requisito de autenticaci\u00f3n. La causa ra\u00edz es que se llama a \u201ccreateWebhookRouter\u201d en \u201cserver.ts:188\u201d sin un mapa de \u201cvalidators\u201d, por lo que la guarda de encadenamiento opcional de \u201creceivers.ts:80\u201d se eval\u00faa como \u201cundefined\u201d y el bloque de validaci\u00f3n de firma (\u201creceiver.ts:81-95\u201d) se omite incondicionalmente. Cualquier cliente de red no autenticado que conozca un slug de servidor v\u00e1lido puede inyectar cargas \u00fatiles arbitrarias, las cuales son posteriormente servidas como estado de recurso confiable a clientes MCP leg\u00edtimos. El commit 7f19b52280f414f57af2b79a95333d1c8fbeece5 corrige el problema."}], "lastModified": "2026-10-24T13:10:00.147", "sourceIdentifier": "security-advisories@github.com"}