CVE-2026-73483 · GHSA-9gvv-qjj3-2p6g

Flowise NodeVM sandbox escape via puppeteer allowlist - authenticated RCE and arbitrary file read via Chromium

Risk score: 73/100
CVSS: 8.8 v3.1
Exploit chance (30 days): 0.6%
Published: 13 Aug 2026

Open in the live forecast Today's forecast

What to know

What it is: Flowise (packages flowise and flowise-components) in versions <= 3.1.2 contain a sandbox escape in the vm2/@flowiseai/nodevm JavaScript sandbox. An authenticated user with access to the /api/v1/node-custom-function endpoint can escape the sandbox by supplying attacker-controlled executablePath and args parameters to p…
Affected: flowise (npm) <= 3.1.2; flowise-components (npm) <= 3.1.2
Fix: Upgrade flowise to 3.1.3; flowise-components to 3.1.3 or later.
Exploitation: Public proof of concept

Story map

Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

flowise: Red, act today. Flowise before 3.1.3 contains a regex-based Python code validator bypass in CSV and Airtable Agent nodes that allows unauthenticated attackers to inject malicious code via prompt injection. Attackers can exploit unblocked pandas functions like pd.read_json() to exfiltrate datasets, perform SSRF against internal servic…

The flaws

CVE-2026-73483: Flowise NodeVM sandbox escape via puppeteer allowlist - authenticated RCE and arbitrary file read via Chromium (CVSS 8.8 · EPSS 1%)
CVE-2026-73487: Flowise Prompt Injection to RCE and SSRF via CSV/Airtable Agent Python Validator Bypass (CVSS 9.8 · EPSS 1%)

The fix

Upgrade flowise: 3.1.3 or later on your release line

Who is exposed: flowise (npm) <= 3.1.2; flowise-components (npm) <= 3.1.2

Where it stands

Public proof of concept

Connects to

Same weakness: OS command injection (CWE-78). 308 other warnings in 30 days

Why it is Amber

CVSS 8.8 high
Public exploit or proof of concept referenced
On your watchlist: npm

Affected packages

Package	Ecosystem	Vulnerable	Fixed in
flowise	npm	<= 3.1.2	3.1.3
flowise-components	npm	<= 3.1.2	3.1.3

References

Original description

Flowise (packages flowise and flowise-components) in versions <= 3.1.2 contain a sandbox escape in the vm2/@flowiseai/nodevm JavaScript sandbox. An authenticated user with access to the /api/v1/node-custom-function endpoint can escape the sandbox by supplying attacker-controlled executablePath and args parameters to puppeteer.launch(), which internally invokes child_process.spawn() outside the sandbox boundary. This allows execution of arbitrary OS commands as the Flowise process user (root in the official Docker image) and arbitrary host file disclosure via Chromium's file:// URL handling. In versions 3.0.8–3.1.2 exploitation requires ALLOW_BUILTIN_DEP=true; earlier versions are exploitable by default. Fixed in 3.1.3.

Last activity 7 Oct 2026. Patch Forecast updates every hour.