CVE-2026-48039

{"id": "CVE-2026-48039", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-48039", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-07T19:41:49.858751Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "pipeboard-co", "product": "meta-ads-mcp", "versions": [{"status": "affected", "version": "< 1.0.109"}]}]}], "published": "2026-08-07T20:16:51.723", "references": [{"url": "https://github.com/pipeboard-co/meta-ads-mcp/releases/tag/1.0.109", "source": "security-advisories@github.com"}, {"url": "https://github.com/pipeboard-co/meta-ads-mcp/security/advisories/GHSA-9gw6-46qc-99vr", "source": "security-advisories@github.com"}, {"url": "https://github.com/pypa/advisory-database/tree/main/vulns/meta-ads-mcp/PYSEC-2026-413.yaml", "source": "security-advisories@github.com"}, {"url": "https://github.com/pipeboard-co/meta-ads-mcp/security/advisories/GHSA-9gw6-46qc-99vr", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-287"}]}], "descriptions": [{"lang": "en", "value": "Meta Ads MCP is a Model Context Protocol (MCP) server that lets AI assistants run Meta Ads. Prior to version 1.0.109, `AuthInjectionMiddleware.dispatch()` at `http_auth_integration.py:272` unconditionally forwards unauthenticated Streamable HTTP requests to downstream MCP tool handlers without issuing a `401` response, allowing any network-reachable caller to invoke MCP tools without authentication. When no per-request credential is present, tool handlers fall back to the `META_ACCESS_TOKEN` environment variable, and when the downstream Meta Graph API call fails, `api.py:263\u2013269` serialises the raw `httpx` request URL\u2014including the operator's `access_token` as a query parameter\u2014into the JSON-RPC response body, delivering the credential to the unauthenticated caller. Version 1.0.109 fixes the issue."}, {"lang": "es", "value": "Meta Ads MCP es un servidor de Protocolo de Contexto de Modelo (MCP) que permite a los asistentes de IA ejecutar Meta Ads. Antes de la versi\u00f3n 1.0.109, \u201cAuthInjectionMiddleware.dispatch()\u201d en \u201chttp_auth_integration.py:272\u201d reenv\u00eda incondicionalmente las solicitudes HTTP transmitibles no autenticadas a los manejadores de herramientas MCP posteriores sin emitir una respuesta \u201c401\u201d, permitiendo a cualquier llamador accesible por red invocar herramientas MCP sin autenticaci\u00f3n. Cuando no hay una credencial por solicitud presente, los manejadores de herramientas recurren a la variable de entorno \u201cMETA_ACCESS_TOKEN\u201d, y cuando la llamada a la API de Meta Graph posterior falla, \u201capi.py:263-269\u201d serializa la URL de solicitud \u201chttpx\u201d sin procesar -incluyendo el \u201caccess_token\u201d del operador como un par\u00e1metro de consulta- en el cuerpo de la respuesta JSON-RPC, entregando la credencial al llamador no autenticado. La versi\u00f3n 1.0.109 soluciona el problema."}], "lastModified": "2026-10-23T20:10:00.160", "sourceIdentifier": "security-advisories@github.com"}