---
id: CVE-2026-73602
title: >-
  Flowise before 3.1.3 contains a sandbox escape vulnerability in the vm2
  JavaScript sandbox that allows authenticated users to execute arbitrary code
  by exploiting moment locale validation bypass
summary: >-
  Flowise before 3.1.3 contains a sandbox escape vulnerability in the vm2
  JavaScript sandbox that allows authenticated users to execute arbitrary code
  by exploiting moment locale validation bypass. Attackers can craft a fake
  String object …
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-95
vendor: flowiseai
product: flowise
affected:
  - flowise < 3.1.3
patched:
  - flowise 3.1.3
published: '2026-08-13'
updated: '2026-09-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73602'
references:
  - url: >-
      https://github.com/FlowiseAI/Flowise/commit/4211bfc8f15746be4019bba557e29a7ba83d54c5
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-rqh4-rxw3-93rp
    label: disclosure@vulncheck.com
  - url: 'https://www.vulncheck.com/advisories/flowise-before-sandbox-escape-to-rce'
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00845
epssPercentile: 0.56491
ingestedAt: '2026-09-05T15:41:17.330Z'
---

## Overview

Flowise before 3.1.3 contains a sandbox escape vulnerability in the vm2 JavaScript sandbox that allows authenticated users to execute arbitrary code by exploiting moment locale validation bypass. Attackers can craft a fake String object with a match function that bypasses path traversal checks to load and execute malicious JavaScript files stored in the document store outside the sandbox.

## Affected

- `flowise < 3.1.3`

## Remediation

Upgrade past the affected range:

- `flowise 3.1.3`