CVE-2026-105740 (GCVE-0-2026-105740)

Vulnerability from cvelistv5 – Published: 2026-10-05 20:46 – Updated: 2026-10-05 20:46
VLAI
Title
Langflow: Authenticated RCE via MCP Stdio transport allows any user to execute arbitrary OS commands on the server
Summary
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, any authenticated Langflow user can achieve Remote Code Execution (RCE) on the server by adding an MCP server with the "Stdio" transport. The user-supplied command field is passed directly to bash -c "exec {command}" with zero validation, no allowlisting, and no sandboxing. The command executes immediately when the server list is fetched. Additionally, the env field allows arbitrary environment variable injection (e.g., LD_PRELOAD, PATH override). This vulnerability is fixed in 1.9.0.
Severity
9.9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
Impacted products
Vendor Product Version CPE status
langflow-ai langflow Affected: < 1.9.0
guessed Create a notification for this product.
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      "title": "Langflow: Authenticated RCE via MCP Stdio transport allows any user to execute arbitrary OS commands on the server"
    }
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    "dateReserved": "2026-10-05T19:11:07.946Z",
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          }
        ],
        "id": "CVE-2026-105740",
        "lastModified": "2026-10-05T21:16:35.567",
        "metrics": {
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}



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