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Advisory record · GHSA-9gvv-qjj3-2p6g

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

CVSS 9.4 CriticalCriticalEPSS 0.0062 · 49th percentile

Critical, because:

  • CVSS score 9.4: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 7 Oct 2026, 16:17 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
flowisenpm<3.1.33.1.3
flowise-componentsnpm<3.1.33.1.3
Identifiers
GHSA-9gvv-qjj3-2p6g · CVE-2026-119978 · CVE-2026-73483
Weakness (CWE)
CWE-78 · CWE-749
Tags
Published
7 Oct 2026
Updated
31 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Flowise (npm packages flowise and flowise-components) versions before 3.1.3 contain a sandbox escape in the NodeVM JavaScript sandbox that is reachable through the node-custom-function endpoint. An authenticated user who can reach that endpoint can break out of the sandbox and run arbitrary operating system commands as the Flowise process user, and can read arbitrary files on the host. For versions 3.0.8 to 3.1.2 exploitation requires ALLOW_BUILTIN_DEP set to true; earlier versions are exploitable by default. Upgrade to 3.1.3 or later.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.4 Critical 4.0 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 CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0062, the 49th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 30 Oct 2026, 17:28 UTC Confirmed by the CVE List
  2. 30 Oct 2026, 18:17 UTC Confirmed by NVD
  3. 31 Oct 2026, 13:32 UTC First seen by agentprime
  4. 31 Oct 2026, 13:32 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.