CVE-2026-54449: falha de alta gravidade em langbot-app LangBot
LangBot: Authenticated RCE Via MCP Configuration
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21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 8.8epss 0.7%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Produtos afetados
langbot-app · LangBotCVEs relacionadas — langbot-app LangBot
No mesmo produto, das mais perigosas para as menos.
CVE-2026-90562CRITICALLangBot before 4.10.11 Authentication Bypass via Weak Recovery KeyEPSS 0.7%CVE-2026-90938HIGHLangBot through 0.4.17 Unauthenticated Plugin Registration via WebSocketEPSS 0.6%CVE-2025-59835HIGHLangBot has a cross-directory file upload vulnerability, which could lead to system takeoverEPSS 0.4%CVE-2026-28509MEDIUMLangBot has a Cross Site Scripting(XSS) VulnerabilityEPSS 0.2%CVE-2026-112265HIGHLangBot through 4.11.0 Missing Lark/Feishu Webhook Authenticity VerificationEPSS 0.2%