CVE-2026-69253 Flowise Sandbox Escape to RCE

Flowise is a drag-and-drop user interface for building customized large language model LLM flows. Prior to version 3.1.3, several custom-tool components — AgentAsTool, ChatflowTool, and ExecuteFlow — ran code in the in-process vm2 sandbox. To build that code, they inserted a user-controlled...

CVE-2026-69253

Summary of findings (CVE-2026-69253). Flowise allowed in-process vm2 sandbox JavaScript execution for several tools (AgentAsTool, ChatflowTool, ExecuteFlow) with the baseURL injected into generated code, enabling code injection and sandbox escape. The vulnerability arises because baseURL validati...