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

flowise (npm), flowise-components (npm)

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…

First seen: 7 Oct 2026
Last update: 7 Oct 2026, 16:17 UTC
Fixed in: flowise 3.1.3
flowise-components 3.1.3
Identifiers: CVE-2026-73483
CVSS: 9.4
Source: GitHub advisory
On the menu as: npm packages
Chrome

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Flowise NodeVM sandbox escape via puppeteer allowlist - authenticated RCE and arbitrary file read via Chromium
Severity: critical. Patch status: patched.
Affected: flowise (npm), flowise-components (npm)
Fixed in: flowise 3.1.3, flowise-components 3.1.3
Ids: CVE-2026-73483

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…

## Steps
1. Search every lockfile and manifest (package-lock.json, yarn.lock, pnpm-lock.yaml, requirements*.txt, poetry.lock, uv.lock, composer.lock, go.sum, Cargo.lock, Gemfile.lock) for `flowise`, `flowise-components`. For each hit, compare the installed version with the fix on the same major line: flowise 3.1.3, flowise-components 3.1.3. If it's lower, give the exact upgrade command for the package manager this repo uses.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-73483") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9gvv-qjj3-2p6g https://github.com/advisories/GHSA-9gvv-qjj3-2p6g https://nvd.nist.gov/vuln/detail/CVE-2026-73483 https://www.vulncheck.com/advisories/flowise-before-sandbox-escape-via-puppeteer
https://pwned.coffee/i/flowise-nodevm-sandbox-escape-via-puppeteer-allowlist-au-cve-2026-73483

Sources

Totalone very hot coffee