CVE-2026-73483: Flowise Remote Code Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-9gvv-qjj3-2p6g
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Advisory Summary

CVE-2026-73483 is a CRITICAL remote code execution vulnerability (General Security Weakness) affecting Flowise libraries in the npm ecosystem. The issue involves flowise nodevm sandbox escape via puppeteer allowlist - authenticated rce and arbitrary file read via chromium. Remediation is available by upgrading affected packages to version 3.1.3.

CVE-2026-73483 at a Glance

CVE Identifier CVE-2026-73483
GHSA Identifier GHSA-9gvv-qjj3-2p6g
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Flowise
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-73483

To remediate this vulnerability, upgrade all affected Flowise dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

flowise fixed: 3.1.3 
npm install flowise@3.1.3
flowise-components fixed: 3.1.3 
npm install flowise-components@3.1.3
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls flowise

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-73483, inspect your project dependencies using npm:

npm ls flowise

Analyze the terminal output to locate any version of Flowise in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.1.3), your application is affected.

Note: The npm ls flowise command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under General Security Weakness. In Flowise, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-73483 Affected Flowise Versions

2 component(s)
Fixed Versions:
3.1.3
Product / Package Ecosystem Affected Versions Fixed Version
flowise
npm/flowise
npm
< 3.1.3
3.1.3
flowise-components
npm/flowise-components
npm
< 3.1.3
3.1.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9gvv-qjj3-2p6g
NVD — CVE-2026-73483 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-73483
Flowise Source Repository REPOSITORY
https://github.com/FlowiseAI/Flowise
www.vulncheck.com/advisories/flowise-... WEB
https://www.vulncheck.com/advisories/flowise-before-sandbox-escape-via-puppeteer

Frequently Asked Questions

What is CVE-2026-73483?
CVE-2026-73483 is a security vulnerability in Flowise involving Flowise NodeVM sandbox escape via puppeteer allowlist - authenticated RCE and arbitrary file read via Chromium under General Security Weakness.
Which Flowise versions are affected?
Affected versions include releases prior to 3.1.3 across affected packages: flowise, flowise-components.
What version fixes CVE-2026-73483?
Upgrading to 3.1.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is flowise affected?
Yes, flowise is affected in releases prior to 3.1.3. Upgrade your dependency to 3.1.3 or later.
Is flowise-components affected?
Yes, flowise-components is affected in releases prior to 3.1.3. Upgrade your dependency to 3.1.3 or later.
What CWE is associated with CVE-2026-73483?
CVE-2026-73483 is classified under General Security Weakness.
How can I check npm dependencies for CVE-2026-73483?
Run the dependency tree command: 'npm ls flowise'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-9gvv-qjj3-2p6g",
  "modified" : "2026-10-07T16:17:02Z",
  "published" : "2026-10-07T16:17:02Z",
  "aliases" : [ "CVE-2026-73483" ],
  "summary" : "Flowise NodeVM sandbox escape via puppeteer allowlist - authenticated RCE and arbitrary file read via Chromium",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "flowise"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.1.3"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 3.1.2"
    }
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "flowise-components"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.1.3"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 3.1.2"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9gvv-qjj3-2p6g"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-73483"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/FlowiseAI/Flowise"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/flowise-before-sandbox-escape-via-puppeteer"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-07T16:17:02Z",
    "nvd_published_at" : null
  }
}