CVE-2026-73483: Flowise sandbox escape via puppeteer in NodeVM

CVE-2026-73483 · Severity: critical · CVSS 8.8 · Published 2026-08-13

Flowise is a low-code platform for building conversational AI applications. The vulnerability allows authenticated users to escape the JavaScript sandbox and execute arbitrary commands on the server (as root in Docker deployments) or read any file on the host system. This can lead to complete system compromise and exposure of sensitive data.

Technologies: flowise (npm), flowise-components (npm). Vendors: npm.

Quick answers

Is CVE-2026-73483 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-73483 being exploited in the wild.
How severe is CVE-2026-73483?
Critical severity, with a CVSS score of 8.8, published 13 August 2026.
Which products and versions are affected?
flowise (npm) <= 3.1.2, SEMVER:introduced=0,fixed=3.1.3; flowise-components (npm) <= 3.1.2, SEMVER:introduced=0,fixed=3.1.3.
Is there a fix for CVE-2026-73483?
Yes. flowise (npm): upgrade to 3.1.3 or later; flowise-components (npm): upgrade to 3.1.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-73483 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-73483?
Check whether you run flowise (npm) or flowise-components (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • flowise (npm): upgrade to 3.1.3 or later
    npm install flowise@3.1.3
  • flowise-components (npm): upgrade to 3.1.3 or later
    npm install flowise-components@3.1.3

Technical details

The vulnerability is a sandbox escape in the vm2/@flowiseai/nodevm JavaScript sandbox used to safely execute custom user code. The root cause is the inclusion of 'puppeteer' and 'playwright' in the allowlist of available dependencies. An authenticated user with access to the /api/v1/node-custom-function endpoint can call puppeteer.launch() with attacker-controlled executablePath and args parameters, which internally invokes child_process.spawn() outside the sandbox boundary. In versions 2.0.0–3.0.7, this is exploitable by default; in 3.0.8–3.1.2, exploitation requires the ALLOW_BUILTIN_DEP=true environment variable. Secondary exploitation via puppeteer's headless mode allows arbitrary file read on the host (e.g., via file:// URLs). The vulnerability was patched in version 3.1.3.

Affected products

  • Flowise flowise <= 3.1.2
  • Flowise flowise-components <= 3.1.2

Identifiers

  • CVE-2026-73483
  • GHSA-9gvv-qjj3-2p6g

Timeline

  • 2026-07-29: disclosed: GitHub Security Advisory GHSA-9gvv-qjj3-2p6g published
  • 2026-08-13: patched: Fixed in version 3.1.3
  • 2026-08-13: advisory: CVE-2026-73483 published

References

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