Is CVE-2026-105740 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-105740?

CVE-2026-105740 has a CVSS v3 severity of CRITICAL (9.9).

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CVE-2026-105740

Description

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.