CVE-2026-46442
Flowise: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.1.2, POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitrary JavaScript to the Custom JS Function node. When E2B_APIKEY is not configured — the common deployment case — Flowise executes this code inside a NodeVM sandbox. This sandbox can be escaped, allowing an attacker to reach the host process object and execute system commands via child_process. The result is authenticated remote code execution on the Flowise server host. This issue has been patched in version 3.1.2.
| CWE | CWE-94 |
| Vendor | flowiseai |
| Product | flowise |
| Published | Jun 8, 2026 |
| Last Updated | Jun 9, 2026 |
Get instant alerts for flowiseai flowise
Be the first to know when new unknown vulnerabilities affecting flowiseai flowise are published — delivered to Slack, Telegram or Discord.