CVE-2026-54449

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{"affected": [{"affectedData": [{"product": "LangBot", "vendor": "langbot-app", "versions": [{"status": "affected", "version": "<= 4.10.7"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "LangBot is a global IM bot platform designed for LLMs. In version 4.10.7 and earlier, any authenticated user can add or change an STDIO MCP server configuration without an adequate authorization boundary. In src/langbot/pkg/provider/tools/loaders/mcp.py, StdioServerParameters accepts the configured command and arguments and starts a server-side subprocess on the LangBot server. An attacker who can sign up or obtain an account can use the Extensions MCP configuration to execute arbitrary commands with the privileges of the LangBot service, enabling data disclosure, modification, and service disruption. No fixed version is available as of this review."}, {"lang": "es", "value": "LangBot es una plataforma global de bots de mensajer\u00eda instant\u00e1nea (IM) dise\u00f1ada para LLMs. En la versi\u00f3n 4.10.7 y anteriores, cualquier usuario autenticado puede a\u00f1adir o cambiar una configuraci\u00f3n de servidor STDIO MCP sin un l\u00edmite de autorizaci\u00f3n adecuado. En src/langbot/pkg/provider/tools/loaders/mcp.py, StdioServerParameters acepta el comando y los argumentos configurados e inicia un subproceso del lado del servidor en el servidor de LangBot. Un atacante que puede registrarse u obtener una cuenta puede usar la configuraci\u00f3n de Extensions MCP para ejecutar comandos arbitrarios con los privilegios del servicio LangBot, lo que permite la divulgaci\u00f3n de datos, la modificaci\u00f3n y la interrupci\u00f3n del servicio. No hay una versi\u00f3n fija disponible a partir de esta revisi\u00f3n."}], "id": "CVE-2026-54449", "lastModified": "2026-10-18T20:10:00.110", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-54449", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-21T21:00:27.881131Z", "version": "2.0.3"}}]}, "published": "2026-08-20T17:18:17.910", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/langbot-app/LangBot/security/advisories/GHSA-3pvh-63gf-j9mw"}, {"source": "security-advisories@github.com", "url": "https://www.ox.security/blog/mcp-supply-chain-advisory-rce-vulnerabilities-across-the-ai-ecosystem"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-77"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.10.7]"}}], "enrichment": {"confidence": 88.0, "confidence_source": "matching", "scores": [{"score": 88.0, "source": "matching"}]}, "original": {"product": "LangBot", "source": "cna", "vendor": "langbot-app"}, "product": "langbot", "vendor": "langbot"}], "created": "2026-08-20T20:45:04.598967+00:00", "updated": "2026-08-21T13:01:41.298588+00:00", "vendors": ["langbot", "langbot$PRODUCT$langbot"]}