CVE-2026-61427

{"id": "CVE-2026-61427", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-61427", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-16T15:17:49.489510Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.3, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 3.4, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.9, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "disclosure@vulncheck.com", "affectedData": [{"vendor": "MervinPraison", "product": "PraisonAI", "versions": [{"status": "affected", "version": "0", "lessThan": "4.6.78", "versionType": "semver"}, {"status": "unaffected", "version": "4.6.78", "versionType": "semver"}], "packageURL": "pkg:pypi/praisonai", "defaultStatus": "unaffected"}]}], "published": "2026-07-15T12:18:18.260", "references": [{"url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-hc5v-gxvj-58wh", "source": "disclosure@vulncheck.com"}, {"url": "https://www.vulncheck.com/advisories/praisonai-before-authentication-bypass-via-http-stream", "source": "disclosure@vulncheck.com"}, {"url": "https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-hc5v-gxvj-58wh", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "description": [{"lang": "en", "value": "CWE-20"}]}], "descriptions": [{"lang": "en", "value": "PraisonAI before 4.6.78 exposes the MCP HTTP-stream transport without authentication by default: the CLI --api-key option defaults to None, and the server only enforces Authorization/Bearer checks when an API key is configured. When an operator runs 'praisonai mcp serve --transport http-stream' without an API key, an unauthenticated client (no Authorization header, and no Origin header, which is also permitted) can initialize a session, enumerate the available tools (tools/list), and invoke tools (tools/call). Additionally, the dispatcher forwards tool-call arguments to handlers without validating them against the advertised inputSchema. The server binds to 127.0.0.1 by default, so remote exploitation requires the operator to bind to a network-accessible address (e.g., --host 0.0.0.0)."}, {"lang": "es", "value": "PraisonAI anterior a 4.6.78 expone el transporte HTTP-stream de MCP sin autenticaci\u00f3n por defecto: la opci\u00f3n --api-key de la CLI por defecto es None, y el servidor solo aplica comprobaciones de Autorizaci\u00f3n/Bearer cuando se configura una clave API. Cuando un operador ejecuta \u2019praisonai mcp serve --transport http-stream\u2019 sin una clave API, un cliente no autenticado (sin encabezado de Autorizaci\u00f3n, y sin encabezado de Origen, lo cual tambi\u00e9n est\u00e1 permitido) puede inicializar una sesi\u00f3n, enumerar las herramientas disponibles (tools/list), e invocar herramientas (tools/call). Adem\u00e1s, el despachador reenv\u00eda los argumentos de llamada a herramienta a los manejadores sin validarlos contra el inputSchema anunciado. El servidor se enlaza a 127.0.0.1 por defecto, por lo que la explotaci\u00f3n remota requiere que el operador se enlace a una direcci\u00f3n accesible por red (p. ej., --host 0.0.0.0)."}], "lastModified": "2026-10-24T21:10:00.130", "sourceIdentifier": "disclosure@vulncheck.com"}