Vulnerability Report

CVE-2026-46442

RCE

Title: Flowise Authenticated Remote Code Execution

RCE

Proof Of Concept

PoC Available for CVE-2026-46442

CWE Category CWE-94

Published Date Jun 08, 2026

Modified Date Jul 23, 2026

Exploit Status Available

Score 9.4 CVSS v4.0

Exploit Probability (EPSS)

3.49%

Vulnerability Summary

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.

Impacted Vendors

flowiseai 1

Reference Links

https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2 https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2

CVSS v4.0

Source Entity [email protected]

Severity CRITICAL

9.4

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW VECTOR

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1