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CVE-2026-46442

CVE-2026-46442 · Flowise: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 9.4 · Critical · EPSS 3.4% · Public exploit · Fix available

Published
Updated

Stack: node

Affected products and versions

  • flowise

    Versions
    • < 3.1.2: Affected

    No fix published

  • flowise npm

    Affected ranges
    • SEMVER: < 3.1.2

    Update to 3.1.2

Original sources

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