CVE-2026-46442

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-94

• https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2Product, Release Notes
• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2Exploit, Mitigation, Vendor Advisory
• https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2Exploit, Mitigation, Vendor Advisory

Published

Jun 8, 2026

Last Modified

Jul 23, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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